EEVblog 1527 - Toshiba T1000LE DOS Vintage Laptop Repair HELL

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  • เผยแพร่เมื่อ 22 มิ.ย. 2024
  • This Ebay Toshiba T1000LE vintage DOS In ROM laptop repair turned out looking promising until, well, it didn't...
    If you find my videos useful you may consider supporting the EEVblog on Patreon: / eevblog
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    00:00 - THE laptop that cointed the term Notebook, the Toshiba T1000 series
    05:46 - It obsoleted the Tandy 100 and Tandy 200
    07:00 - Powering up
    10:16 - Opening up had a few issues - OOPS
    12:12 - The first suspect
    17:55 - Bad caps?
    20:50 - Suspect process
    23:18 - Backup battery SRAM problem
    24:12 - Thermal camera
    26:32 - Extra sneaky PSU
    33:27 - Under the microscope, this looks BAD!
    37:00 - Yuck!
    44:28 - BUSTED
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    #ElectronicsCreators #Repair #vintage
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ความคิดเห็น • 441

  • @GadgetUK164
    @GadgetUK164 ปีที่แล้ว +91

    These old Toshibas are shockingly bad - both in layout / design and the caps and trace thickness on PSU section. I started looking at a T1200 (yet to revisit with microscope soon) and I spent hours messing around trying to get the PSU section up and running properly. I suspect I may not be able to fix it... Considering how old it is, I was shocked at the trace and via size on the T1200 PSU board (it has just one separate PSU board unlike the T1000). I can hardly see them with magnification...

    • @EEVblog
      @EEVblog  ปีที่แล้ว +19

      Everyone on the forums say similar things. Convoluted PSU, no schematic, corroded traces, yuck.

    • @arnolduk123
      @arnolduk123 ปีที่แล้ว +71

      @@EEVblog These Toshibas series will not power on without a charged battery, hence the red flashing led. The trick is to power the laptop directly through the battery terminals with 7.2V to 9V DC. If the battery voltage is any higher or lower than 7.2V to 9V then the laptop will not power on or will shutdown instantly. Using the battery terminals to power the laptop will bypass much of the over complicated main power switching circuit. Also the hard disk caddy needs to be fitted as there is a microswitch that prevents the laptop from powering on when it is removed. The back light and invertor is likely to be bad too but a 12V LED strip works as an improved upgrade to replace them. The back light inverter can overload the power circuit so good idea to disconnect that before powering up. Good luck with it as I've found the power circuit to be almost impossible to repair but had success using the methods that I've explained.

    • @michael.a.covington
      @michael.a.covington ปีที่แล้ว +15

      @@arnolduk123 I hope Dave will go for that. Don't fix the original PSU but instead use simulated battery power.

    • @arnolduk123
      @arnolduk123 ปีที่แล้ว +11

      @@michael.a.covington Yeah, these laptops were designed to run directly from battery power and most of the power circuit is used to keep the battery charged.

    • @andrewsadach3194
      @andrewsadach3194 ปีที่แล้ว +4

      @@EEVblog honestly you messed up... Put in capacitors that actually go with this system with the actual correct voltage instead of the surface mount ones you used.

  • @michaelcalvin42
    @michaelcalvin42 ปีที่แล้ว +49

    45:06 - "People are probably screamin' at me!"
    I was one of those people xD
    I had planned on letting you know about the cracked caps (which I had thought were diodes) if you didn't notice them before the end of the video.

  • @CSTRSK
    @CSTRSK ปีที่แล้ว +23

    On the Back side is a physical broken diode or some thing.
    C517 below the coil between C520 and C521 40:45 found at 45:01 😅

    • @Rezendes
      @Rezendes ปีที่แล้ว +10

      C520 visibly cracked in half

    • @tubes41
      @tubes41 ปีที่แล้ว +5

      Yup, and the one near the speaker too on the same side of the board..

  • @ernstoud
    @ernstoud ปีที่แล้ว +34

    I was product manager with Toshiba in The Netherlands from 1989 until 1994. Interesting times. So many revolutionary inventions; small harddisks, pcmcia, first color TFT (T4400 series), hefty competition with Compaq, dramatic price drops etc.
    The sub battery is for “AutoResume”, i.e. instant power on, remember that MS-DOS had no support for standby.

  • @hans429
    @hans429 ปีที่แล้ว +8

    T1000? Conner drive? Dude ya wasted perfectly good Terminator joks

    • @EEVblog
      @EEVblog  ปีที่แล้ว +3

      Yup, I feel ashamed.

  • @ziginox
    @ziginox ปีที่แล้ว +28

    The sub battery is a feature that laptops had up until the late Pentium days. You could put the machine in standby, then yoink the main battery and swap in a fresh one. The sub battery (called standby battery in other machines) would keep the RAM refreshed for the short time needed to swap main batteries out. They also sometimes keep the CMOS settings, but it's not uncommon for a computer to have a separate battery just for that.

    • @eDoc2020
      @eDoc2020 ปีที่แล้ว +2

      I believe my 2005 Dell has this feature but it doesn't seem to work right.

    • @johndododoe1411
      @johndododoe1411 ปีที่แล้ว

      PDAs with Microsoft operating systems had dedicated memory batteries well into the 2000s, some models even had mechanical interlocks for replacing one battery at a time. Then Microsoft finally embraced the existence of flash memory, only to squander their market position by completely replacing their APIs multiple times in a few years. That last failed design is what's most hated about recent Windows products, besides obnoxious behavior towards customers and governments.

  • @dombaker6210
    @dombaker6210 ปีที่แล้ว +24

    I had a T1100, and a T1200. The keyboard was lovely to use. The thing I remember the most was the smell that had something really special about it as it reminded me of the happy first contact with computers.

    • @DaveF.
      @DaveF. ปีที่แล้ว +6

      Ah the smell of gently simmering electrolyte perhaps?

    • @8bitbubsy
      @8bitbubsy ปีที่แล้ว +1

      @@DaveF. Why would you smell that back then? That's a thing you smell decades later when the caps fail.

    • @andymouse
      @andymouse ปีที่แล้ว +1

      @@8bitbubsy Its called a 'Joke'

    • @8bitbubsy
      @8bitbubsy ปีที่แล้ว +1

      @@andymouse Good 'Joke'.

    • @DaveF.
      @DaveF. ปีที่แล้ว

      @@8bitbubsy Thanks!

  • @sarah1390
    @sarah1390 ปีที่แล้ว +25

    I'm also noticing under the marking R513 that there is another black component that has a decent crack through it as well

    • @StubbyPhillips
      @StubbyPhillips ปีที่แล้ว +4

      He eventually noticed the components with the giant cracks in them. I suspect our beloved host could possibly benefit from some reallocation of available resources, trading a bit of high speed output for some additional input bandwidth...

    • @AndrewFremantle
      @AndrewFremantle ปีที่แล้ว +1

      @@StubbyPhillips I'm kinda wondering if it's not a field of view thing. The Tagarno is a physical microscope, right? He might not be seeing as much through the eyepieces as we're seeing on camera.

    • @reacey
      @reacey ปีที่แล้ว

      You need to use your senses before anything else, amazing how many things can be repaired by just looking properly , cant beleive you didnt see those cracked caps in all honesty. With all due respect, you can have all the knowledge in the world but if you dont have that fault finding brain/eyes/senses , youll be there all day

    • @lolilollolilol7773
      @lolilollolilol7773 ปีที่แล้ว +1

      @@reacey It's true he could have seen it earlier, but you tend to look for the usual suspects first. Cracked components is definitely not the first thing you think of or look for, especially in a laptop. It might very well be the first time he sees that in 30 years. So it's really not that surprising that he didn't look at it first. It's worth wondering how this happened, because it's very unusual that such small components crack like that. We would expect them to melt under heat, not crack. It's surprising that several components failed like that.

    • @jaro6985
      @jaro6985 ปีที่แล้ว

      37:15 C520, blown tantalum cap

  • @billpeiman8973
    @billpeiman8973 ปีที่แล้ว +12

    I have incorporated OKI 80C55-2 and 80C88 in our products for 30 years; still use them today.

  • @thowij
    @thowij ปีที่แล้ว +8

    I have a couple of these machines as well as a T1200, T1000 and a couple of T1000XE's.
    It's a love-hate relationship. I love the look&feel and the history behind them but every single one you get has the same problem.
    The Elna and NipponChemicon caps used in the DC-DC converters all just start leaking from the bottom and the electrolyte does the rest.
    No way to judge it from the outside of the machine or even from the top of the board.
    On top of that, what looks like minor damage may lead you down a very, very deep rabbit hole.
    I've fixed all 3 of my T1000LE's and they still work after a couple of years.
    In the mean time I've fixed, amongst others, two T1600 and reverse-engineered the PSU PCB's for them along the way.
    Feel free to send me a message if you need any information or just want to exchange thoughts (see my YT community or about page).
    I have 3 of these to check component values, etc. if need be.
    I've spent countless hours searching the web and staring at these boards so I'd like to think I know a thing or two about them.

  • @changeagent228
    @changeagent228 ปีที่แล้ว +16

    I love remembering all the old systems I grew up with but I don't miss how slow everything was. 😄

    • @CommodoreFan64
      @CommodoreFan64 ปีที่แล้ว

      For sure, and these days outside of running old games on original hardware, or the odd piece of defunked sofware till we hit the late XP era with DDR2 RAMthey really are not that usable. It also still blows my mind even at 42 having been a computer user since I was 2 when my family got a Commodore Vic-20, at how even a cheap sub $200 Android tablet these days puts older desktop systems even from the XP era to shame.

    • @changeagent228
      @changeagent228 ปีที่แล้ว +1

      @@CommodoreFan64 Yeah and phones. The ability to casually edit 4K, play 3D games or run n-body simulations. Phones newer than 2019 can run an xbox360 emulator which may not sound that impressive given the console age but at such low wattages on a portable device with emulator overheads really is. Give it another 20 years and phones will probably have ray tracing chips.

  • @anfa75
    @anfa75 ปีที่แล้ว +7

    Regarding copper traces, use a thin tin-plated copper wire and solder it from point a, bend the wire along the trace, solder the wire in the trace towards point b. It will be nice that way.

  • @IanScottJohnston
    @IanScottJohnston ปีที่แล้ว +30

    It's worth the time to repair for YT, always great to see a nice juicy repair.
    PS. if you want to see a rabbit hole check my Keithley 2001 DMM vids. I needed a holiday afterwards!

    • @Zh4n6Wu
      @Zh4n6Wu ปีที่แล้ว +3

      oh, i missed it. have a look right away

    • @EEVblog
      @EEVblog  ปีที่แล้ว +9

      Not when I have so many other videos I have a backlog of unfortunately.

  • @johnsonlam
    @johnsonlam ปีที่แล้ว +36

    Definite need to add jumpers, lot of work! C520 broken, if someone got a good one, please help to check the value.

    • @szabotihamer
      @szabotihamer ปีที่แล้ว +12

      I also noticed C520 as well. Definitely doesn't look healthy. Edit: Seems like Dave noticed.

    • @-Kal-
      @-Kal- ปีที่แล้ว +11

      @@szabotihamer I'm glad he found it. I was jabbing at the screen

    • @romancharak3675
      @romancharak3675 ปีที่แล้ว +2

      @@-Kal- Me too!!

    • @mrommella
      @mrommella ปีที่แล้ว +1

      @@-Kal- m

  • @phloodpants
    @phloodpants ปีที่แล้ว +5

    Whoa! These ELNA RSH series "Long-Life" capacitors are the same ones that plagued the Adcom GFA-565 audio power amplifier. It's a wonderful amplifier, but these leaky capacitors caused every single one of them to fail, often causing a large DC voltage to appear at the speaker terminals, often blowing out a speaker.
    The electrolyte actually soaks into the fiberglass PCB, and it causes it to become slightly conductive, which causes the front end of the amplifier to amplify nearby DC rail voltages, and the amp can go up to 83VDC.

    • @menotyou8369
      @menotyou8369 ปีที่แล้ว

      For some reason Elna has fanboys, I've always hated them, pure garbage.

    • @johndododoe1411
      @johndododoe1411 ปีที่แล้ว

      Ouch, making the PCB fiberglass conductive is horrible and would require a complete rebuild of any affected device, just to restore the basic functionality of being a PCB.
      Only saving grace would be if your observation was merely a paper based cheap PCB material getting soaked in anything wet, while actual fiberglass boards are safe from that particular danger.

  • @jamesking7868
    @jamesking7868 ปีที่แล้ว +5

    Dave, C520 (large black SMD cap) on the underside looks like it has a large crack through it.

  • @KeritechElectronics
    @KeritechElectronics ปีที่แล้ว +5

    T1000LE? A mimetic poly-alloy. None of that living tissue over a metal endoskeleton rubbish.
    (I'm sorry Dave, I'm afraid I really had to drop some pop-culture references - but Dirty Harry is yours)
    And hmm, seeing a Conner disk in a T-1000? Can't be a coincidence!
    Lovely old laptop - shows how far we've gone since WayBackWhen! I hacked with some late '90s Toshiba Satellite, and a Thinkpad 380ED, but nothing that old.
    Oh the mobo, a thing of beauty and a joy for ever. Too much rosin leftover for my taste though.
    Unassuming CPU indeed. Who would have thought?
    14:54 these xtals in a DIP package are a fascinating thing in itself, now that I've seen that in the Open Circuits book.
    Electrolytic come-a-gutser, as always - what else would you expect? I would still bend the leads and put them through holes for extra mechanical rigidity.
    Extreme discombobulation going on there on the backside! I wonder where this corrosion (hey now, hey now, now...) came from. Catch you later with this laptop, I hope! I'd love to see the launch.

  • @ToddSweeney341
    @ToddSweeney341 ปีที่แล้ว +2

    These old laptops are amazing thank-you for the post awesome stuff 😀😀

  • @NikiBretschneider
    @NikiBretschneider ปีที่แล้ว +5

    There is a lot of corrosion caused by leaked capacitors, which is pretty typical for caps from that era, especially if they are "high quality" brands. They leak out instead of drying out, so if they are not replaced (or removed) before they definitely fails, they cause a huge mess of electrolyte, corrosion and similar things on the PCB, which is typically non reparable issue. I prefer capacitors that dry out instead of leaking, which are typically the cheap ones. They are more often to fail, but also much easier to repair. In my opinion, that leakage caused a short between the windings of that big inductor (L501 or what), so I think this one should be at least rewound. Next thing are that broken SMT capacitors, which is in my opinion caused by slightly higher voltage like >7V on the 5V line (that capacitors are typically 6.3V), which, if occurred (and we know this happened), fried almost all TTL logic, so I think this device is completely nonrepairable. Which is something very typical for these old toshiba laptops.
    And well, plastic housing of these devices was painted. It was a huge pain in the ass past then, because almost every repair resulted into some minor paint rip offs caused by bending or stretching that housing. Plastics are flexible, but the paint is not. That was a terrible idea, but, well, this was how things was made past then.

  • @preferredimage
    @preferredimage ปีที่แล้ว +6

    I've got a T3100 with the orange gas plasma display. I had to buy two complete machines to get enough working parts to make one working one. really nice display.

  • @josephcote6120
    @josephcote6120 ปีที่แล้ว +8

    WordPerfect was all I ever needed. The split-screen mode where you could see every formatting mark was very handy. Now, if I ever have to modify a Word document there's a 99% chance I'm going to end up wrecking the whole thing.

    • @lolilollolilol7773
      @lolilollolilol7773 ปีที่แล้ว +4

      J.R.R Martin apparently still writes on one of those. Perhaps that's why it seems to never be coming out... like he wrote 90% of his last novel and his oooooolde laptop went kaput, and unrepairable.

    • @redtails
      @redtails ปีที่แล้ว

      you most likely already know this, but in modern word processors like Libreoffice and MS Office, you can enable the formatting display "¶" to see exactly what the program is doing

  • @grappydingus
    @grappydingus ปีที่แล้ว +2

    Can't wait for the sequel!

  • @MartinE63
    @MartinE63 ปีที่แล้ว +1

    We had several hundred T1100+ dual floppy laptops for field engineer use in the late 1980’s, near zero failures of the units themselves but the mains to dc power supplies from Toshiba were notoriously bad, running hot and with thermal fuse failures. We gave up on Toshiba replacements and eventually designed and manufactured a new one in house.

  • @OneBiOzZ
    @OneBiOzZ ปีที่แล้ว +2

    rip it all out and put a pi in there. Figuring out the keyboard might be a pain but it can probably just be wired to a USB keyboard controller directly. The display might need to be replaced if you dont want to go down the rabbit hole of figuring the display out
    Might make a nice serial terminal

  • @SudosFTW
    @SudosFTW ปีที่แล้ว +3

    Had one of these. never worked. Same issue, caps leaked out and it's all because of the Quaternary Ammonium Salts issue which plagued those caps, the Elnas and others. there's reasons why ones that still rely on that tech are now relegated to special use cases, and are protected against leakage like this. This is the same issue that made apple surface mount caps go bad.
    Best course of action would be to throw this in an ultrasonic cleaner and let that work the magic for a couple hours, and then rinse it in the dishwasher with non-corrosive detergent-- you'd be surprised how much cap gunk can be removed with just a touch of detergent! If you need the value of that tant that blew, I can probably go down to my board in the basement which I've kept after all these years and get you a reading off of it and I'll report back as time permits.

  • @WreckDiver99
    @WreckDiver99 ปีที่แล้ว +1

    My room mate in University had one of those laptops. He got it because it could accept an accessory card, that accessory card was a text-to-speech system. So cool back in the day.

  • @coreybabcock2023
    @coreybabcock2023 ปีที่แล้ว +1

    These are the videos I enjoy watching the most your tear down and repair and mailbag videos I plainly remember one about a marine GPS unit with super Caps in it or the handheld sat phone several years ago I watched those

  • @floodo1
    @floodo1 ปีที่แล้ว +2

    “How bad do you want it?” For real, cool machine but it would take a labor of love to salvage it

  • @OnStageLighting
    @OnStageLighting ปีที่แล้ว +12

    Tiny traces, rotted vias. Could be a fun hobby project for someone to practice their micro repair, but in the areas where the corrosion has set in, you'd have to lift every chip or other component that may have a trace or via under it. And in doing so, potentially lift traces in the process. This era of things seem to have infuriatingly tiny and weak traces and pads (and poor adhesion to the board). In this situation, there is also a risk that a section of trace disappears completely and you have no idea it was ever there in order to fix it.

    • @Shmbler
      @Shmbler ปีที่แล้ว +3

      Yes, this one I would give up on. Corroded vias are worst, and this board has like a hundred to check/fix. Not even speaking of repairing the traces. It would take me countless hours for some very uncertain outcome. I've had my own experiences with NiCd juice corroding all SMT pads from the underside so whatever is left of the pads will instantly lift from the board. That was a pretty frustrating repair experience.

    • @johndododoe1411
      @johndododoe1411 ปีที่แล้ว

      ​@@ShmblerBut was this NiCd leak from either battery or electrolyte leak from the ELSAs?

    • @maxtrix1
      @maxtrix1 ปีที่แล้ว

      It’s easier to remake the board and order the BOM than repair with that level of corrosion

  • @jamesmauer7398
    @jamesmauer7398 ปีที่แล้ว

    I waited to the end to see if you saw those cracked caps! Good luck with this one!

  • @Petertronic
    @Petertronic ปีที่แล้ว +3

    I recently did an extensive repair on a liquid damaged PCB, had to strip off all larger components, add many bodge wires, replace multiple SMD transistors, rebuilt and got it fully working again. A lot of via's had failed - they aren't fully protected by the solder resist coating. I'm afraid the prospects for your Toshiba board don't look too good to me :(

  • @regenceaudio
    @regenceaudio ปีที่แล้ว +1

    Please more videos of vintage computers!

  • @johnellison3030
    @johnellison3030 ปีที่แล้ว +1

    Wow. I had an SE. And Wordperfect 5.1. And... wait for it... Xtree Gold 😀. Anyone remember the Amiga 500 and Supremacy ?

  • @nathanial7249
    @nathanial7249 ปีที่แล้ว

    As a bloke born in 2000, I find it fascinating the older technologies, there is something special about these older pieces. Probably doesn't help i'm an EE student who loves this stuff hehe

  • @nikmilosevic1696
    @nikmilosevic1696 ปีที่แล้ว

    WOW, wordperfect, I remember using that back in the 80s and early 90s. To get that cleaned up and repaired, your going to have to remove a fair bit of solder mask to ensure you dont have residual corrosives lurking under there.

  • @ford6815
    @ford6815 ปีที่แล้ว +3

    c520 in the last section looks a bit split, and I'd be surprised if them traces still worked haha

  • @Zh4n6Wu
    @Zh4n6Wu ปีที่แล้ว

    Sad dead puppy, but as always an exciting video. I like repair vidoes. Thx Dave

  • @Xsses
    @Xsses ปีที่แล้ว +1

    I think I have one of the biggest collection of Chicony Acrobat laptops (I have 2 of them) and sadly both of them suffer similar issues. The capacitor plague was a terrible era in the history of electronics.
    I was hoping that I can learn here how to fix my laptops, so I am really waiting for part 2. Thx for sharing the knowledge and expireence.

  • @gregfaris6959
    @gregfaris6959 ปีที่แล้ว +2

    I have a 110CT Windows 98 VHS Cassette-sized machine from almost the same era that I use to interface my oscilloscopes and analyzers (RS-232) when travelling, and it works just fine.
    I actually set up a dual-boot DOS 6/Windows 98, and I use almost exclusively the DOS side. The hard drive is getting arthritic, and I actually had to open it at one time to un-stick it, so I'm looking into getting it replaced (hopefully with an SSD) but otherwise I can't complain. The battery even holds enough charge to move the device from one side of the room to the other whilst remaining connected - probably a good minute or so. Far more compute capacity than they used to go to the moon and back!

  • @Fezzler61
    @Fezzler61 10 หลายเดือนก่อน

    There are so many T1000 out there that do not work and cannot be repaired. But people love them. I would love to see a hack or development project to replace the innards with a new board and bring them back to life for fun.

  • @1967CougarXR7
    @1967CougarXR7 ปีที่แล้ว

    When I saw the title of this video I figured I should watch. I have a T1200XE that has the same symptoms. I guess I need to pull the motherboard now and see what the underside looks like. I do really want to get it working. It belonged to a buddy, and he gave me all his old computer stuff to add to my collection.

  • @FtG-1001
    @FtG-1001 ปีที่แล้ว

    Waaay back when, I started buying old laptops for $5-$10 at garage sales to teach myself laptop repair. This was the 2nd one I got. (The first was an old Zenith "portable".)
    What I found was that it wouldn't boot without a working battery. I opened up the battery pack using an Xacto, replaced the NiCads with NiMHs. (Which required that I only charged them separately, not thru the machine.)
    This laptop, with full 1M of memory and an 8086 processor, could run MS-Windows 2 nicely in protected mode.
    Another problem I had was it didn't have a floppy. To get software on it I had to do a command line comm trick with a Laplink cable to load Laplink and then transfer stuff via the parallel port. Worked great, lots of fun. Had to go away during my downsizing move a couple years ago.

    • @tubastuff
      @tubastuff ปีที่แล้ว

      8086 doesn't have a protected mode--are you perhaps thinking of an 80286?

  • @johnwalton5576
    @johnwalton5576 ปีที่แล้ว

    Sorry Dave, but I vote for you to continue down this rabbit hole because I found part one to be fascinating and entertaining.

  • @joeyjustin6895
    @joeyjustin6895 ปีที่แล้ว +1

    HI DAVE. ALL CAPS JOE HERE
    THANKS FOR THE VIDEO. THAT LED FLASHES WHEN IT CAN'T DETECT A BATTERY AND THAT BATTERY IS BEYOND FLAT AND IT CAN'T SEE IT AT ALL SO IT'S FLASHING THE LED

    • @TomStorey96
      @TomStorey96 ปีที่แล้ว

      No need to SHOUT. 🙄

  • @tolkienfan1972
    @tolkienfan1972 ปีที่แล้ว

    That looks like the laptop my dad had. I loved it!

  • @zsigmondkara
    @zsigmondkara 11 หลายเดือนก่อน

    As a japanese electronic component aficionado, the inside of this thing is an absolute beauty!

  • @gennidee
    @gennidee ปีที่แล้ว +2

    While some old HDDs tend to be surprisingly reliable, the Conner 2.5" drives were not. They, like some of their Quantum 3.5" contemporaries, suffer from sticky rubber bumpers that glue the head stack in place so the head will not move. If yours has this problem, carefully disassemble the drive (making sure to not get the also disintegrating rubber gasket on the platters), power it on, help the head stack to unlock using your fingers and then get the data off quickly. Only a temporary fix, unfortunately.

  • @ethnicstyledotca
    @ethnicstyledotca ปีที่แล้ว +1

    Cool, I remember playing on one of these as a kid. My dad worked as a radio tech for Ministry of Transportation and Highways and used it program radio's among other things. The LCD was so slow it was not a gaming machine, especially if it was cold.

    • @gorak9000
      @gorak9000 ปีที่แล้ว

      I used to play the Indycar racing game on a T1200. I thought it was amazingly cool to be able to take the computer to other places other than home and still play indycar. The screen though, so slow it was almost useless!

  • @IvyMike.
    @IvyMike. ปีที่แล้ว +1

    You got loads of working dumpster dive monitors and TV's Dave, maybe use one as a monitor for the camera when you are recording?

  • @MrNerdHair
    @MrNerdHair ปีที่แล้ว

    I just started working on restoring a T1000 a few days ago! First single-board laptop on the US market, and my first computer as a kid. (My dad had one of the fancy new Windows 3.1 machines.) I've also picked up a T1200, and its guts are very similar to this.
    Those brown ELNA / "LongLife" caps are notorious leakers. The T1200 has a whole bank of odd values and sizes on its power board, most of which are leaking. Both machines have other brands of caps in various places as well, but the bad ones are all those brown ones.

    • @Fezzler61
      @Fezzler61 10 หลายเดือนก่อน

      Did you ever get it going? I recapped mine and nothing. The components are so darn close on the T1000 circuit board.

  • @mihaibalint8183
    @mihaibalint8183 ปีที่แล้ว

    oh my, this is brand new!!!

  • @InssiAjaton
    @InssiAjaton ปีที่แล้ว

    I just remembered an old Tektronix report. It described their factory repair procedure. The very surprising statement was that the nearly first operation they did was to wash the scope in a dish washer, using distilled water! They followed that with a long (24 hour?) drying. That was maybe in the 1990's, possibly even earlier.
    The other thing -- I relate any power indicator pulsation to the built in "hiccup" mode start, fail, retry due to overload somewhere after (or possibly within) the power supply. As to leaked capacitor fluids, my finding has been that rather than the usual high concentration IPA, a 5 to 10% IPA or even plain distilled water often works better. But a lengthy soaking may be required in any case.

  • @greypatch8855
    @greypatch8855 ปีที่แล้ว

    There are a few traces needing help haha. Don't give up! Save this guy

  • @MrDoneboy
    @MrDoneboy ปีที่แล้ว

    Yes Dave, do the Tandy 200 video!

  • @jimtron66
    @jimtron66 ปีที่แล้ว

    Dave! C520! LOOOOOK!
    I feel like I've been watching a pantomime show!
    Dave, over there! No the other way!
    - Yes, I WAS shouting at the TV.
    Need to take a nap now..... 😬

  • @channelkerr
    @channelkerr ปีที่แล้ว

    Ah this gives me PTSD from a T1900 - a later model but similar symptoms and a bastard to take apart and repair. Again, some people swore by re-capping alone but myself and others never got theirs working. And it didn't even have board damage like your T1000! These things are definitely not for the faint of heart 😬

  • @kirko451
    @kirko451 ปีที่แล้ว

    Hi, The T800 is Terminator, this is the T1000, it must be Arnold's strong cousin... good luck with the repair.

  • @inp1ace
    @inp1ace ปีที่แล้ว

    Used T1000LE/T1900s as a kid, solid machines and can confirm the power supplies gave some trouble

  • @snap_oversteer
    @snap_oversteer ปีที่แล้ว +1

    I had (well still have in pieces) T1200, it was great when it worked, sadly it slowly decayed - first both floppy drives died, then LCD stopped working and finally mainboard kicked the bucket. It's certainly interesting laptop, but generic enough not to warrant full repair, altough the ALPS mechanical keyboard is great and I'm tempted to make adapter to connect it to newer PC.

  • @jarthurs
    @jarthurs ปีที่แล้ว

    Last time I used these was in the mid-90's when it was running braille translation software to produce braille materials for a correspondence course. It worked fine for years despite the amount of paper dust it was exposed to.

  • @zapanjormas4787
    @zapanjormas4787 ปีที่แล้ว

    oh-oh! i have two of thems here^^ some memories of my work at France Telecom, in 1990's ^^
    I have the SE version if i remember well, but no hard drive inside. I should check... ;)

  • @tafsirnahian669
    @tafsirnahian669 ปีที่แล้ว +1

    I've never seen a MOSFET with green package. That's pretty cool!

  • @hardscorerockkssss
    @hardscorerockkssss ปีที่แล้ว +6

    if you look at 37:50 you can see c524,c521 and c520 markings on board you can see big line or big crack inside black chip.could that be fault?

    • @EEVblog
      @EEVblog  ปีที่แล้ว

      You didn't watch the whole video

  • @elektron2kim666
    @elektron2kim666 ปีที่แล้ว

    I bought a similar used one back then for "not so much" as I needed a backup/development place for a Psion 3 (Arm, pocket, on 2 AA batteries.) I have a similar system today as a side hobby to play with now and then.

  • @stevencarlson5422
    @stevencarlson5422 ปีที่แล้ว +1

    be such a nightmare to repair that board but with patience anything can be fixed

  • @Dreifgenoff
    @Dreifgenoff ปีที่แล้ว

    Ooo, my first laptop when I was 7, still works..

  • @simoncrabb
    @simoncrabb ปีที่แล้ว

    That keyboard is beautiful.

  • @OsmosisHD
    @OsmosisHD ปีที่แล้ว

    I know it will require a lot of time and work, but I and I guess plenty others do like watching someone resurrecting such a ancient piece of hardware back from the dead. Might be borderline madness this adventure but... still

  • @ucmRich
    @ucmRich ปีที่แล้ว

    i cant wait to see that beautiful screen ^_^

  • @JakubChalupnik
    @JakubChalupnik ปีที่แล้ว

    ELNA capacitors are pretty much no-brainer, you replace them when you see them and you don't even bother measuring them. I fixed an AT power supply recently, all ELNA ones were dead, one even shot the alu can to the space and all that was left was a roll of paper :) All other caps were fine, even after some 25 years or so.
    It's actually good to see ELNA caps in a non-working device, you know instantly where the problem is.

  • @Janktzoni
    @Janktzoni ปีที่แล้ว

    At 37:34 an exploded cap is visible, it is named C520. And another one without name near R513 is split too. Clean that board in the ultrasonic.

  • @TheDefpom
    @TheDefpom ปีที่แล้ว +1

    @40:00 yep plenty of open traces and open via’s… it’s fixable from my perspective.

    • @EEVblog
      @EEVblog  ปีที่แล้ว +2

      Yeah it's ultimately fixable, it's just a matter of how much time you want to spend on it.

  • @RobTheSquire
    @RobTheSquire ปีที่แล้ว

    Yep it will not be a simple repair... It will be an EPIC repair.

  • @joshuacox5344
    @joshuacox5344 ปีที่แล้ว

    Love how you said "made in a merica " lol made my morning ❤🎉😂

  • @gryzman
    @gryzman ปีที่แล้ว +1

    the cracked C520 Dave, Dave! how did you miss that for half the video

  • @babayaga5225
    @babayaga5225 ปีที่แล้ว

    YES! YES! Screaming, "Look the cap! Look the cap!" oO

  • @borayurt66
    @borayurt66 ปีที่แล้ว

    I had the little brother (by age) of this, T1200XE, all thru my university years.

  • @iAMxplosiff
    @iAMxplosiff ปีที่แล้ว

    Yep. I have a similar model (think it was a T1000SE?) and tried repairing it doing exactly what you've done quite a few years ago. Stuck in the same boat. The capacitor leakage was much worse in my example

  • @mrlithium69
    @mrlithium69 ปีที่แล้ว +4

    @37:20 Dave, C520 Diode is CRACKED in half. You missed it.

    • @EEVblog
      @EEVblog  ปีที่แล้ว +2

      Keep watching...

    • @rusty-
      @rusty- ปีที่แล้ว

      @@EEVblog we were all screaming at you about that one and the other one 😂

    • @rusty-
      @rusty- ปีที่แล้ว

      @@EEVblog we were all screaming at you about that one and the other one 😂

  • @hatueymieses7864
    @hatueymieses7864 ปีที่แล้ว +1

    Part 2 please, you can save it, find some time, it doesn't need to be soon

  • @Burner103
    @Burner103 ปีที่แล้ว

    I have one of those, it didn't boot when we moved last year, but I might have had the wrong power supply. I think it flashes a green light though.
    Pretty sure it's painted metal on the back of the monitor.

  • @FabioNicolasSchmidt
    @FabioNicolasSchmidt ปีที่แล้ว

    I have this same model, unfortunately it was in bad condition, the internal battery leaked and literally destroyed the main board. I cleaned it up and some day I will try to fix it.

  • @suadcokljat1045
    @suadcokljat1045 ปีที่แล้ว

    I feel you pain! I have like 100+ retro laptops like that in my collection, restoring and repairing them 10-15 years ago. Caps electrolyte is devil himself. These laptops have multilayer PCB. Vias go bad, traces go bad, party going on under ICs, bad, bad, bad... all bad ;-) But endless fun when repaired and comes to life. Cheers! S PS, there is some kind of LCD inverter inside LCD housing - BAD! ;-)

  • @jhhoward
    @jhhoward ปีที่แล้ว

    I have two broken Toshiba T1000SE laptops very similar to this which I've tried to get up and running but without any luck. I recapped all of the capacitors but couldn't get them to boot. I thought it was just my shoddy soldering skills but it looks like there is more to it! A problem I've had is the wire connectors with the LED and charge boards are really brittle and I ended up breaking one when disassembling / reassembling :(
    I'll be looking forward to a part 2 to see if you can get it working!
    I also have an original Toshiba T1000 which is a completely different piece of hardware and switches on OK. It also has a power issue with it dropping out when attempting to use the floppy drive but boots to ROM DOS just fine.

  • @n2n8sda
    @n2n8sda ปีที่แล้ว

    so many memories from this! some great, some the stuff wes craven could use to make a new horror film from... I had several connor drives back in the day.. still have a 40mb somewhere and last time it was powered up (about 5 years ago it still worked!) most of them developed bad sectors galore.
    I have a box of 4mb expansion cards somewhere (like 100 of them) I got at an IT liquidation sale in the early 2000s, cant remember if they fit this or not.
    I do remember these being an utter nightmare to work on.

  • @matusekpetr7806
    @matusekpetr7806 ปีที่แล้ว

    Once i spotted those cracked tantalums, it gets obvious this board is gonsky. Overvoltage 7V on 5V rail probably fried almost all chips on board 🔥

  • @ponakka
    @ponakka ปีที่แล้ว

    I had one that had a trackball on the right side of the screen. If i remember it right the ball was there toshiba text was and the mouse buttons were on the other side on the lid. Windows 3.0 was really funky to use because screen ghosted so much.

  • @labiadh_chokri
    @labiadh_chokri ปีที่แล้ว

    Nice video, try to power the main bord with another power supply with the adequate rail voltages

  • @LinusJohansson-yu7cy
    @LinusJohansson-yu7cy ปีที่แล้ว

    Damage from leaky capacitors and NiCD's are a major concern when working with vintage computers.
    Only positive is that the repair work gets pretty straightforward, cleaning and restoring vias and traces.

  • @0xbenedikt
    @0xbenedikt ปีที่แล้ว

    At 32:55 the residue is, as you later identified, leaked out electrolyte from the capacitors. I had this a lot when I repaired old Macintoshes. Give it a thorough clean with hot soapy water and a rinse with pure isopropyl. Some connections may require re-soldering to work again.

    • @0xbenedikt
      @0xbenedikt ปีที่แล้ว

      Looking at the bad traces at 38:15, I’d say the board is BER. This when I usually gave up a capacitor-corroded board after following a long rabbit-hole with my first terrible one. On capacitor-corroded boards, as the corrosion often destroys traces under chips and often vias too, you don’t have a chance especially if you don’t have massive amounts of time and a schematic.

  • @Blitterbug
    @Blitterbug ปีที่แล้ว

    Thank goodness you saw those caps, my voice was hoarse by then! Mind you its easy to say that, I'm not the bloke staring down a microscope trying to narrate a video.

  • @5cyndi
    @5cyndi 9 หลายเดือนก่อน

    I taught my high school students WP5.1 and remember that overlay!

  • @stevec00ps
    @stevec00ps ปีที่แล้ว

    Haha yes I was screaming at the monitor about those two cracked components :)

  • @MultiWirth
    @MultiWirth ปีที่แล้ว

    My oldest computer is a Compaq Armada 7770DMT from 1997.
    It´s very impressive how quick computers developed within a few years back then.
    It has a 233mhz pentium mmx, maxed out at 144mb ram total and currently i have a 100gb ide hdd installed.
    It runs Windows 98SE very well, however it also makes a great DOS gaming machine thanks to it´s full vga graphics support and ESS audio drive with full soundblaster compatibility.
    It can do 32 bit colors at 800x600 native resolution. I think it has 2 or 4 mb video ram but lacks of 3d acceleration support.

  • @eeengineer8851
    @eeengineer8851 ปีที่แล้ว

    Senior college thesis written in WP 5.1 in 1991. Got the 5-1/4 floppies around someplace.... Never owned or used (employer's) laptop until 2001 I think. Traveling engineers (not me) would sometimes have them. Now of course hardly any desktops in use at my company except some on production testers.
    Tantalum caps could have popped from OV. My company has had a derating of 50% on those and avoid if possible in designs. MLC caps have replaced the need for a lot of them now though.

  • @mikehigham23
    @mikehigham23 ปีที่แล้ว

    Around 47:10 C520 is cracked in half!!
    Also the one just down right of it - near speaker.

  • @adriansdigitalbasement
    @adriansdigitalbasement ปีที่แล้ว

    This is why I stay away from laptops and notebooks. They are always nightmares!

  • @ghinckley68
    @ghinckley68 ปีที่แล้ว +1

    Time to send it to Adrian Black

  • @undeath6010
    @undeath6010 ปีที่แล้ว

    i was sitting here.. screaming and pointing at the screeen. like C520 CRACKT! 🤣🤣🤣

  • @aamiddel8646
    @aamiddel8646 ปีที่แล้ว

    Wow, good memories. I had the version without a harddisk and just a floppy. Memory expansion was using a PCMIA card with a wopping 2 MB (if i remember correct).