I found some more retro PC at the Car Boot Sale and One was a tricky fix!
ฝัง
- เผยแพร่เมื่อ 8 ก.ย. 2024
- Three retro computers this weekend, One of them gave me a real runaround to get it working. How would you have done with this one? Wanna find out then you just gotta press PLAY
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Thank you
Richard
It's never the power supply - until it is. Great analytics, Richard!
Looking forward to the day I come by a 486 or earlier machine to get up and running. It'll take me back! My first PC was a Compaq XT and I wish I had have hung on to it. A great way to learn computing and computer science; very much hands-on from the get go. Another enjoyable video, thanks Richard :)
I think this is only the 4th one I found in over four years at the flea market. This 486DX4-120 motherboard/CPU combo is available with the Soundblaster 16 ISA, graphics card and 8Mb RAM. I'll include the 600Mb HDD with it as well though I don't know if that is fully working as shown in the video. I also have AT power supplies available. electronicanaria@outlook.com
I love the NetVista systems, but they are expensive to get these days. I have two and I probably spent around $150 to get them.
In that case, it was a good purchase for €15,-🙂
Hah, with the AT machine, i thought to myself, let's not say S3 Trio64 for a change, and i muttered "trident"... Videocard bingo!
Yeah I haven't seen a Trident for ages. Well done🙂
Love retro computer parts and computer parts in general, great video and awesome troubleshooting content!
a really good technique for straightening pins on a CPU is to use a carpenters knife AKA Stanley knife use the blade (removed from Stanley casing) use blade sharp side down and gently straighten the pins by pushing left or right on the pins :)
I am sure you know this already, but socket athlons without a 12v 4 pin connector take most of their power off the 5v rail. You need a psu with at least 30a if not more. Thanks for all the cool videos. Also if you put a geforce 3 or 4 in there and try to boot with any psu good luck.
I've recovered dead hard drives using GSmartControl. But it depends what the physical damage is how that's going to go. All GSmartControl can do is flag bad sectors on the disk. If the drive has bad heads or a bad spindle it can't do anything for that.
Hello, AMD Athlon Thunderbird north of 1GHz draw a pretty hefty amount of power if your motherboard don't feature the 12V CPU power connector it will try to draw almost 70 watts from the 5V rail of the 20 Pin ATX connector so maybe both PSUs are in perfectly working condition but one of them has a stronger 5V rail.
Thanks for the video.
The QDI board was previously tested and working on my 'known good' 20 pin ATX PSU so I think the power supply just gave up at some point. I will look at it on another video out of interest
The reason many retro fans look especially for these. A modern PSU won't do.
@@LearnElectronicsRepair Hello, do you mean the CPU and motherboard combination was tested (a similarly thirsty CPU I mean) on your know good PSU?
I'm just telling just because you didn't talk about the heavy load on the 5V rail these CPUs take on PSUs just any normal modern one won't do and just an ild one capable of powering any P3 would struggle with 1GHz+ Thunderbirds.
Best regards.
@@RetroTinkerer Actually I don't know what CPU is in the QDI, unless I have a look or refer back to the video it was featured on, so you could well be correct. My apologies for disagreeing with your advice without checking 🤐
@@RetroTinkerer You are correct! Also PhilsComputerLab did a video on this a while ago titled - Can your PSU handle Athlon or Duron Socket A processors? - th-cam.com/video/efK7mw8eYiE/w-d-xo.html
If I remember correctly those old AMD Athlons/Durons actually needed a power supply that delivered high amperage on the 5 volt rail instead of the 12 volt rail like the Intel's did. They would work very sporadically if there was not high amperage on the 5 volt rail. This can even be a problem with attempting to use one of today's newer PSUs on those old boards that use a greater amperage 12 volt rail/rails but tend to deliver lower 5 volt amperage. AMD just had to be different from the norm back then in their CPUs. They were great CPUs non the less! 👍👍
PS: There is a way to low level format those old hard drives when they occasionally go "out of wack." Something about :800 command.....if I could just remember as it was SO LONG ago.......🤔
When so many caps are bulged on the motherboard, the caps in the PSU are likely even worse and putting out very dirty power. The fact that the more powerful processer caused a different code, might be due to the extra load on a PSU which might already be struggling to put a remotely acceptable voltage to each rail.
At 51:32 it shows the POST screen. At the very bottom, the last section tells you the motherboard name 486PCIMB-U. If nothing else, maybe VOGONS can give you a motherboard manual?
Thanks for the info
Never played with floppies, but I would use Linux for formatting or at least wiping any storage device. It will be a simple block device under Linux (e.g. /dev/fdX) and then you can use low level utilities like DD to write zeros to the drive (e.g. dd if=/dev/zero of=/dev/fda) or something like that. The only problem could be a write error, which I don't know if floppies can have.
Heya, I remember the 486dx400 very well if I'm correct windows 3.0 is the max it can handle with 16 MB or max 32 MB simm it was good workiing with it don't see them much these days
PCs not my area of interest tbh, but my dad would’ve loved watching these & it’s good entertainment. Surprised I watched the whole thing.
Exhumation of a dusty MS-DOS boot floppy, booting and running chkdsk is always good for a laugh.
The last time I played musical floppy drives is probably the last time I'll ever mess with floppies. Those things never worked too good. Not even back in the day.
Guess we got a psu repair vid coming up, lol
Athlons pull all their power from the 5V line, if your PSU can't put out the required current, she ain't gonna boot.
About the AT machine near the end. Don't understand what's the problem with testing it. Couldn't you just put a FreeDOS or something on a CD and have a CD drive connected to the board and boot from that? Do these machines support booting from CD drives? Do you have a different IDE hard drive? Would you have to set up the formatting for a drive in the BIOS?
You need to buy some cans of air duster, to blow out the dust.
Or an air compressor. Even a little tiny air compressor can dust. Heck you can get a tire inflator and a tire tube. That's an old airbrush trick.
hi the gamers hve push the prices up over the years there are youtubers love to make video's
the copy cat love to be like them
i onlly go after AUDIO work ones you come up with good finds over your channel my mate lee said they get old computers in
all the time the thing is they get break up for the steal work not for the pcb i talk to the people that do all the cleaning out of old people homes
this where they get there gear
❤
These boards don't have the 12v connector right? It might be that the psu cannot provide enough on the 5v rail. You want a psu with at least 30 amps on 5v for these boards.
The QDI board was previously tested working on this (now faulty) PSU
@@LearnElectronicsRepair Sounds like a PSU fix video in the future to me.
@@1pcfred Yeah me too
@@LearnElectronicsRepair looking forward to it.
@@LearnElectronicsRepair If the psu has been stressed past 100% on the 5v rail it might snapped. Maybe just a fuse. Would be nice to investigate though.
Couldn't you try to sys the 630 MB HDD from a virtual machine with DOS if you allow hardware access to the VM? If the HDD FAT is still physically in good nick, it should be able to recover and boot again.
Hello, yes working with virtual machines is one option. I have used that mode to prepare HDDs (Fdisk/Format) for boot and copy Windows 98 files on a modern machine and then start the installation on the legacy machine.
I have even imaged old hard disks to a virtual drive with norton ghost and then dumped that image to a bigger and newer HDD, most of the times it have been fast and trouble free but there are exceptions.
Some of the motherboards he had show in previous repair videos have the possibility of booting to MS-DOS from an USB pendrive.
He can also use create a boot floppy on a somewhat old machine that still include both floppy and IDE but can boot from a CD-ROM.
There are several options, finding the right one that can work out with the hardware you have at hand can be pretty time consuming.
@@RetroTinkerer Yes I need to make a good DOS boot disk, floppy or HDD, for the workshop. As you probably notice my interest in retro stuff is a little bit later, from SS7 onwards, and all those PC have USB
Nice, 1st in the room.
Not that it makes any odds but I can reset most passwords on Windows
Could you have tried the different PSU's with your PSU testing tool?
I don't think that would help, this is a problem under load. Even the PSU that was causing the boards to crash appeared to be giving a stable 1.8V to Vcore.
ok, I have a question.... What would happen if there is a short on the 12v rail and you try turning it on anyway (or just turn it on without checking for shorts)? The short was obviously already there, so chances are that any damage caused by the short has already happend before you got it, or am I wrong? I get that you shouldn't turn anything on that has a short, but perhaps you can explain what the consequences would be.
That depends on the power supply and how good the short detection (over current) is.
For that Gigabyte board with CPU you should get around 35 for it
I think it is worth rather more due to having an ISA slot. A lot of Athlon boards only have AGP and PCI. I now have two working Athlon boards with ISA but these are the only ones I have found in over four years at the flea market. I only really collect retro intel (apart from the very sought after GA-5AX rig I have) so both of these are for sale if anyone wants to make me a reasonable offer for either of them electronicanaria@outlook.com
35€ for that specific combination and fully recaped?
Hell tell us all where you find these deals I'm all ears.
All the S462 I find for cheap in Spain are AGP/PCI, that ISA slot can bump the price by itself at least 20/30€.
I'm kind of a cheap bastard and cannot afford the nicest retro stuff but I think he can get easily 50/60€ for that.
@@LearnElectronicsRepair Hi, do you sell stuff directly using that email or you also have ebay, Wallapop and FB marketplace I coul take a peek at?
@@RetroTinkerer At the moment I'm selling directly, payment by Paypal. I used to sell on ebay UK but as I don't travel much to the UK at the moment I've stopped doing that. I'm putting together a website with all the retro stuff I have but it is not my top priority. At the moment I'm open to offers. Most of the retro stuff I've shown on video for the last six months or so is available apart from a few items I want to keep for my self (the voodoo 2, one of the AWE 64 gold ISA, the Voodoo 4 4500 and at least one of the 440BX motherboards, probably the QDI one). I'll also keep the Pentium 3 PGA370 AT board as well for now, that appears to be super rare.
@@LearnElectronicsRepair you may be right. I should have said ATLEAST 35 😂
I wouldn't have wasted my time on that motherboard I would have just binned it
Really? Have you seen how much they sell for on ebay?
I call it installing the ram not fitting LOL
Kitchen roll!
I’d be interested in the Trident card. Where do I find your email?
electronicanaria@outlook.com
WTH was making that clicking sound? There's no relays.. was it PSU?
Speaker - I thought i mentioned that a couple times in the video?
@@LearnElectronicsRepair sorry, my bad 🙂
ISA stands for Industry Standard Architecture
en.m.wikipedia.org/wiki/Industry_Standard_Architecture