ฝัง
- เผยแพร่เมื่อ 20 พ.ย. 2024
- In this video I'll try to repair a heavily corroded Asus P5A, one of the best Super Socket 7 mainboards, based on the glorious ALi Aladin V chipset. The board is heavily corroded and completely dead.
Music by Model Povedeniya
modelp.bandcam...
Patreon:
/ necroware
Absolutely awesome troubleshooting and detective work!
It freaking works!
would you look @ that!
This really is my favourite repair channel. You are very talented and explain things very clearly, with good editing and camerawork. Many thanks for sharing your expertise with us!
And don't forget the pleasant voice and accent!
Hats off to you good sir, what a great repair! People like you are what keep this hobby alive... literally.
Corrosion, i think, acid came from car battery.
Couple board was storaged in wet carton in garage for car.
Congratulations on the successful repair
Thanks for the chance to revive it. That was an interesting case and it was not the last time you heard about this board ;)
Sorry for telling bad news, but it was mice juice by 95% chance...🤢
Quite a few plants have compounds in them that work as a pH indicator. Red vegetables like beets and cabbage. Flowers like the peony. Blueberries also work well.
Usually you can just boil them and use the fluid.
Frozen blueberries work very well, you just cook a few of them and use the juice. Even the liquid from defrosted blueberries work.
They turn bright red in acid and a grey-blue in a base.
Very cool! Have to try that. Thanks 🙏
"convince it to push the bits again" that gold, Necroware, gold! :)
My son had an old 1999 laptop that he played some games on and it went completely dead. I played with it to see if i could make it ' go ' again. I checked out the power supply and all the wires and plug. All checking good, then progressed from there to the motherboard. Tracing the input power cutting out right close to the power plug i began checking everything in the area. Studying with strong magnifier i noticed a couple of those surface - mount resistors that said ' 0.0 ' painted on them. I thought that was a weird resistance value- it was more like a direct short. Then i thought they might be some kind of jumpers on the board so i checked and found one to have zero conductivity.
I got in there and soldered a teeny tiny wire across it.
I brought it back to life, i felt like Viktor Frankenstein
So glorious when documentation is available for the chips, and the problem can be found by logic. If no documentation was available for the southbridge, the only repair would've been going around and testing every component with multimeter. Excellent job!
Once Again, Loved the video, always learn something new here. having schematics of the chip-set are really handy. keep it up man.
You win a new follower today sir. Great repair.
One of the best videos the watch with a morning coffee 🤩 I've had so much headaches with P5A (especially with v1.06) so I sold all those boards away and now my favourite SS7 platform is VIA MVP3, it's super stable, not even one glitch. 🥰 The slow down bug is fixable on v1.06 with one pull down resistor, there's story about it at Vogons. But, I tried it on two boards and when the slow down was fixed I just couldn't get any +model CPU stable over 500MHz. Motherboard just did a reset randomly when staying idle at Windows desktop. And, what's funny, it resets almost instantly when playing a MIDI file with media player. Don't have a oscilloscope so I didn't investigate it any further. But, here's a topic for video for you, adventures of P5A v1.06 and K6-2+/K6-3+. 😉 BTW, on v1.06 when you set jumpers to 2 volts, you get 0 volts 🤣
I remember buying my first mobo, a P5A at a computer show, a very long time ago. It was just introduced, that machine served me well and taught me a lot. It was exciting to get a Pentium SS7, I think I had an AMD K6-2 in it (couldn't afford the Pentium at the time. It was the beginning of my PC madness that followed, hundreds of them...😅
Excellent repair, sometimes I miss my old computer repair days... Oh heck, it was madness! Nothing like what you're doing here, but it sure brought back memories seeing that board. 👍🏻
Brought back from the dead for sure! That was some quite nasty corrosion. Brown like rust, I think this was water.
Lesson learned here... always check all the components heavily affected by corrosion.
To me the v1.06 is still better than the v1.04.
It is very easy to fix the v1.06 problem with K6-2+ cpus, by just adding a resistor.
But the v1.06 has a newer chipset revision and can cache more that 128MB of ram.
Back in time i had thise Board. With an AMD K6-2 550, ~64 MB RAM or so.
Great Work
Thank you for that Video.
Very well done! Your work is inspiring, thank you for your content!
Spooky episode for my P5A to see another rise from its grave!
I also have P5A but voltage regulator is dead. Not just mosfets, but controller IC too.
Very nice. These Asus SS7 boards are excellent.
Very cool! I recently found my P5A-B in a closet in my parents house. It's the baby AT version of the board and was the first system I ever built from parts. It was also the first machine I ran Linux on. I thought that I lost it in a move or something because I can't imagine throwing it out. Very fond memories!
Great board, great repair. That northbridge was in rough shape for certain.
Your troubleshooting skills are just insane. This is literally next-level stuff right here. Very happy you managed to get it working, and didn't give up.
Awesome work! I always enjoy the investigation, explanation and fix implementation of the issues you come across - thank you as always! 😊
The FIC VA 503+ board would run a K6-3+ 450 at 600 mhz. The clock speeds only went to 5.5 but if you set the multiplier to 2.0 it would run at 6.0, FSB to 100mhz = 600 mhz
Excelente reparo, salvou uma baita placas mãe. Abraços do Brasil!
The 560 ohm confusion reminded me of a car joke. Someone wanted a replacement "710" cap for their car. They were adding oil when they dropped it. The numbers "710" look like the word "OIL" when upside down.
Top work again sir... and you got away without reballing the northbridge too!
Cada video de Decroware es una delicia de ver. Es un auténtico detective de problemas, y todo es explicado de forma magistral. Gracias por tanto, y perdón por tan poco :)
Muchas gracias tambien.
I am currently running this board with an AMD K6-2 400mhz on windows 98 with an ATi 9250. I upgraded this boards bios to the last beta version to hold a hard drive larger than 30gb's I also put a DVD drive in it but the ALI chipset has issues with LG branded DVD drives so that is the only limitation to this board. CD based games are great and it runs fast.
Had a P5A. Rocked Motocross Madness 2 and Mech Warrior 3 with the original 'Rage Pro' with a 'whopping' 4mb of video ram.
Thanks for the nostalgia
You are a excellent teacher sir
I hope to inspire people with my channel, but please don't see me as a teacher. There is nothing worse than learning electronics engineering from a software developer ;)
When I had a fix shop here, in Brazil, usually those Asus Boards have 4 capacitors behind the PS/2 port. Those capacitors were with high ESR and work as pulldown resistors. Sometimes we replace those capacitors , sometimes we just rip off and keyboard is back to work again.
I was going to comment the same thing, I have seen this problem on Asus boards like the TUSL2-C and similar boards with the keyboard wake function. The problem part was normally located right behind the ps/2 port.
I'm here for the ".. and would you look at that?" and managed to find one.
This board powers my main DOS gaming rig! Love it~ Although it seems I need to tweak the settings because I'm not getting anywhere near those framerates...
Every time I see a new video of yours I just have to watch. You are so good at this and have brought back multiple boards that many would've considered unrepairable and for parts. Truly impressive stuff. I don't have access to free scrap pc parts and don't have the money to be buying a ton of stuff like this so I don't have much I can work with, but if I could one day get as good as you I would be so happy. Definitely need to do now amateur soldering projects first though lol, all I've ever done was replace batteries in a dozen gba and gbc carts and reflow a surface mount audio jack that showed signs of cracked solder joints in a cheap Chinese emulation handheld I own. All of them came out a success, but I really do need more practice.
Maybe soon I might ask my mom for her father's TI microcomputer and see if that needs any work done for it. I would love to get it working and see if there's any media I can archive from it. It would be so cool to set this up for her so she can revisit programming in basic and the games she played in the 80s. Apparently he had floppy drives and cartridges for this computer too so it wasn't all tape based games.
I think this was the motherboard I bought with a K6-2 300 back in the day. A year and a half later, I then upgraded the CPU to a K6-2+ 550 (which didn't seem slow at the time, so I assume it wasn't one of the problematic revisions). Very happy you managed to repair it!
Another great repair! Well done! I'm using a p5a-b in my retro pc and really like the versatility of it. One of the most reliable Boards too, still ging strong to this day.
Good job!
Great educational video! I learned a lot from you, thanks!
great microscopic shots! Also loved the ruler trick, thank you
So much effort, so much reward. Necro is pc hardware champion
As usual greate work!
Man, you really bring it with your soldering and troubleshooting skills. Well done!
I'll forever cherish this board, got it as an upgrade to a cyrix p150 and the K6-2 300 was such a *HUGE* difference..
I jumped from running Sin at 5fps to 30fps+ Half-life and it served me well for years 🫡
SS7 and Pentium 2 era triggers my nostalgia, those are part of my childhood (this may be a reason that I keep many of those boards without good reason). Nice to see them repaired, although this seems to be more of the maintenance than repair. Recently I wasted a lot of time diagnosing a board that turned out to be fine except of dead battery that prevented it from booting (not even a single post code, even C0 or beep).
Love a deep dive repair video. Nicely done!
I have this board, also the P5A-B (baby AT model) which is the heart of the main retro-computer I use. I also have many other SS7 boards, including the GA-5AX. The asus P5A, or P5A-B which is the same in different format, is the fastest of all of them by a lot. I get 108.6 fps in quake 320x200 and 29.4 fps in Quake 640x480 using a K6-3+ at 574Mhz. If you tweak the bios settings you'll get something close to that with the 550 K6-2+. Also, AFAIK the K6+ issues are only with chipset rev G, not E. Yours and mine are Rev E
Nice to see this level of detailed documentation for the chips. Im under the impression that's becoming harder to get with modern hardware.
Impressive. At the start of the video. I thought the board was a goner. It really looked bad. Nice job.
You son of a gun! Crazy timing, I just dug out my old P5A and cleaned it up a month ago, but have been having an issue I've not been able to really understand the cause of... It will POST, hitting the correct key begins to invoke a response, but then nothing more happens. If you don't press the setup key, it will just sit there after counting up the RAM. Doesn't seem to try to actually boot, and in my 20+ years of working on PCs I've seldom been stumped like this.
Was always kind of a blacksheep out of my collection. VIA chip-set is a no-no usually, but otherwise it is actually a fairly attractive platform for 7/super 7. For some reason I became more interested with running a P55C @ 250 or 300 MHz and being so surprised & impressed that it did it with absolutely no effort. No added voltage, just did it like a champ. Granted, I know this board was really built around being used with K6-2 /3s, not a PMMX. But, IMO, still pretty awesome.
I'd like to get to the bottom of it. Really want that board to get to work full-time hosting my website. That'd bring some good joy... People think stuff 5 years is old is obsolete and have no idea what it could actually do with some patience. Not to mention, it would just but sip power.. no heat, no noise. I approve!
Something to try would be to program the most recent BIOS onto the chip if you have a programmer.
A lot of respect, that you tried to repair this board👍. And congrats that you succeeded 🎉
Wonderful work for repairing this board keeps the great work, I learned from your video quite a lot of things thanks for these videos
Well done. I would have thought there would be no saving that one.
Surprising to see so many resistors go bad.
Korrosion probably got inside of those resistors.
@@necro_ware Sometimes really corroded ones are still good, sometimes just barely corrode and they get bad
Great save with finding that keyboard fault!
The 195 vs 561 gave me a chuckle - I could totally see myself raising an eyebrow on that too lol
Nice recovery and repair of the board.
Nice to see another P5A ready to go!
Another astonishing superb work! You are phenomenal!
This was a mammoth effort. Nicely done!
I think that these BGA chips have to be lifted anyway. With this much brown residue, it is possible that it's pee damage. Happens a lot. Rodents being the most common source of the "sauce". pH strips are very useful when you need to find out if it's acid or base damage.
The summer of 2002 I upgraded a computer for the friend of a friend. It had a P5A 1.04 in it originally, and I swapped in a Socket A board and a Radeon 8500. Out of curiosity, I decided to try my trusty K6-2+ 475 in the P5A while I had it, so I updated the BIOS and set the jumpers. But I set the voltage jumpers to the mirror image of the correct settings, and that immediately fried my poor K6-2+ CPU when I powered it on. Heavy sigh.
In the cases where the corosive substance is unknown; you can get a sample of the corrosion, mix it with a drop of water and test that with a PH testing kit.
That should tell you if you need to clean it with an acid or a base.
Top Job! Suchen - testen - finden -reparieren. Habe ebenfalls so ein P5A 1.04 im Bestand samt OVP. Nutze allerdings derzeit die kleinere Version P5A-B.
Ich auch 😊 aber ohne Original Box. Ich finde einfach kein passendes Gehäuse und würde gerne einen K6-III damit betreiben, den ich nicht besitze.
Darüber hinaus müssen so einige AT und ATX Schaltnetzteile überarbeitet werden. Große Elko Sammelbestellung so kommen mag 😉
Well done
Amazing job!! (I wonder if we will ever have an AI app that given quite high-resolution images could reverse engineer the schematic and the PCB. It could deduce the only logical connections given what it can "see" starting with the parts and then the traces that are visible. It could then help a person troubleshoot the board.)
That would be really nice, though there is still a long way to get there. Let's see, what the future brings.
Another great quality video and repair as always 👍
Great work! Always nice when the fix doesn't involve pulling a BGA :P
Absolutely
Other than my 486 where gaming kinda really started to kick up a notch in quality, this era of boards is one of my favorite.
Nice repair !
I remember frying my first K6-2 as well. As a poor high school kid that didn’t have a lot of money for replacements, it was a sad day.
I have the same board here and the P5A-B Baby AT version... ^^
I added in-situ programming support to flashprog like 15 years ago. Should work from dos.
Yes, flashprog, not flashrom. The latter has been fully assimilated by the borg.
The 195 vs 561 confusion is something the component manufacturers really need to sort out!
It's alive! 😄
I really hate bad fonts, capitalized i and regular L should be distinguishable, same with 2-5, 6-9, 0-O ...
BTW great work, hats off.
Or Haiku OS. Excellent repair 😊
I have one of these to test. Hopefully it fires up.
Cool method with the ruler to straight up pins.
I used to have one of these!!! loved it
I used to sell K62 and K63 CPUs when I started my first IT business, selling PCs etc.
That flux is gnarly
Very strong video!
Danke ;)
Strong as bottle of wine
nice vid, had myself a asus p5a-b rocking a k6-2/450.
Nice. I have the AT variant of this board, it's a fun board!
The best thing for cleaning up corrosion residue is bicarbonate of soda solution because it is amphoteric and thus cleans up both acids and alkalis.
I'm running a P5A rev 1.05 with a K6-2+ CPU in one of my retro machines. I came across a mod online, involving a resistor and connecting some pins together on the backside of the motherboard at the CPU socket. It seems to work fine, I get good benchmark results.
Good job 😊
Very strange corrosion. But that's water under the bridge now.
The board dried enough to be safe. What you see in the video is IPA.
Sorry, it was just a bad pun. ”Water under the bridge” is an expression.
I could not resist.
@@victorwidell9751 ah, I see :)
honestly i always had terrible luck with these SS7 boards, specially MVP3 ones. i decided to use a pcchips m570 and it's a lot more stable than both my via ss7 boards lol. also i like it's oddball agp sis chipset
This damage looks exactly as what I experienced on my asus P4C-800e deluxe p4 board I stored poorly in my shed, It was mouse urine. Unfortunately in my case it got in under the cpu socket so I was unable to fix it. They also destroyed the ati radeon 9800 pro that was fitted to that machine. Lesson learnt, I dont keep my electronics in the shed anymore.
Think you should change the name of the channel from Necroware to Necromancer! I've absoloutely no idea how on earth you managed to bring this heavily damaged board back to life.
What was the bug that made those mainboards crawl with "plus" Amd K6 cpus?
Why couldn't be fixed with a BIOS update?
Non intel systems at the time were very picky and it was difficult to find a combo (cpu + memory + mainboard + agp card) that had acceptable performance and no stability issues.
Many times the issue was problematic cheap chipsets and/or mainboards (thin very low cost "pc cheaps" pcchips).
Even worse, Intel too was very lacking with all the RDRAM saga. 440BX was an act hard to follow it seems.
Best wishes.
RFLMAO that resistor network totally got me too
На канале майнер в носках есть видео, где он собирает преднагреватель для плат. Работа с BGA станет возможной. Я думаю вы уже на таком уровне, чтобы такое мочь. Можно купить готовый - но мне кажется они дорогие. Я бы конструировал его для EATX с возможностью выключать лишние лампы и отражающим зеркалом - чтобы не жарится самому
Nice save, could you make a video on diagnosing and repairing a VIA PLE133T board that does not post nor starts the cpu fan?
Great job!!!
Strange that your POST card has the PC speaker but the pins for it seem to be missing. Can you solder the pins on there and use that speaker rather than using a separate one?
Yes, I just didn't solder those pins. That post analyzer is not good anyway. I only use it sometimes in PCI bus.
I once had a P5A-B not really compatible with a K6-2.
I didn't know it was a commun problem with those boards.
Let's say performances were not impressive :)
You can use the bad CPU as a source of good pins to fix CPUs with broken pins.
They are welded and very hard to get off the cpu.
k62+ was fantastic cpu. had a very hight score with Lame mp3 encoder ;) compared to intel, same Mhz.
but I had mobo with external 1 or 0.5 MB L4 cache on dedicated slot.
Perfect with Photoshop 5.0
I would love to know what kind of witchcraft book are you using to cast spells on those boards and make them work again, because I have a few that need the same kind of magic.
LOL 😂