Extreme 486 VLB board repair. Found at computer Reset

Рет қаралды 20,014

6 ай бұрын

No one wanted this 486 VLB board at Computer Reset, so I grabbed it! Let's try to fix it :)
Power rail and keyboard controller circuitry repair here: • 486 VLB board found at...
Severely battery damaged Shuttle HOT-419 R1 Motherboard.
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Support me on patreon.com/Epictronics
Join me on Twitter: / epictronics1
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Tools I regularly use
DeoxIT D5 Contact Cleaner
Hanstar 861DW Rework Station
Pro'sKit SS-331 Desoldering Station
UNI-T UT61E Auto Ranging Multimeter
UNI-T UT890D Manual Ranging Multimeter
MESR-100 mk2 ESR meeter
PINECIL Soldering Iron
PinePowerPSU
TS-100 Soldering Iron
AMTECH NC-559-ASM Flux
Kester 951 Flux pen
MaAnt Grinding Pen
Multicore 60/40. 0.38mm and 0.5mm solder
TL866 II Plus Programmer
RIGOL DHO800 70MHz four-channel digital scope
Tektronix 2246A 100 MHz four-channel analog scope
InfiRay P2 Pro Thermal Camera
PCBs from PCBWay.com :)
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patreon.com/Epictronics
Join me on Twitter: / epictronics1
Music by Karl Casey @ White Bat Audio

Пікірлер: 243

@LGR 6 ай бұрын

Wow! It is nuts seeing this unwanted mess of a board from CR getting the attention it needed to return to life, against all odds. Fantastic work, and much respect for putting in all the time and effort to get it going 👍

@Epictronics1 6 ай бұрын

Thanks Clint. It was super rewarding to see this board finally POST and pass all the tests!

@HBAVHS 6 ай бұрын

Hours and hours. I can only imagine that working on the board and then editing the video took an incredible amount of time. Awesome, thank you very much

@Epictronics1 6 ай бұрын

It was worth it :) Thanks

@TymexComputing 6 ай бұрын

I thought i have already seen this video few Days ago

@Epictronics1 6 ай бұрын

@@TymexComputing This is part 2

@AndrewFremantle 6 ай бұрын

You are a wizard. And that poor, poor motherboard really should have filed a Do Not Resuscitate order in it's previous life.....

@gt1man931 6 ай бұрын

That ranks as a legendary fix. One of the best board repairs I've ever watched. You brought that thing back from the grave. You have earned the sub and bell.

@Epictronics1 6 ай бұрын

Thanks :)

@SonicBoone56 5 ай бұрын

Congrats on repairing this board! You did a great job. GadgetUK would be proud. And screw anybody who thinks this is a waste of time. GadgetUK can tell you, most boards are able to be saved and are worth saving. Gotta give them the Rick Astley treatment, never give them up.

@Walczyk 6 ай бұрын

can’t wait for you to add the rest of the ram slots, tidy up the wires, and max it out! i love this era

@PixelPipes 6 ай бұрын

Wow I really didn't think this was fixable. You proved me wrong, and it was very impressive!

@Epictronics1 6 ай бұрын

Thanks!

@OzzFan1000 6 ай бұрын

"Screw you, Varta!" 😂😂😂

@Epictronics1 6 ай бұрын

@sl9sl9 6 ай бұрын

This may be your magnum opus, take a bow sir. That board was so wrecked only a person who had lost their mind would attempt a repair, but it sure did make some great video content!

@Epictronics1 6 ай бұрын

Thanks!

@tony359 6 ай бұрын

Nice repair - I relate to the "why wasting so much time on this?" as the reward when all works is immense! The only thing is that you end up with so many bodge wires which make the MoBo not appealing! But who cares! Well cone for the repair! The green rubber tool is indeed amazing, I got them some time ago after watching Necroware's videos. I tend to use them by hand, they work well anyways.

@Epictronics1 6 ай бұрын

Thanks Tony, Yeah, I tried the tip as an eraser by hand after your recommendation. it works great for cleaning up one or a few traces!

@PROSTO4Tabal 6 ай бұрын

Hats off. This is True computer necromancy. World be grest ifcyou could run Heretic on vlb video card. You have done a lot of work. Cant believe this board was saved from death

@Epictronics1 6 ай бұрын

Thanks!

@MIJ-Tech 6 ай бұрын

The 486 era holds a special place in my heart. I'm glad to see a happy ending for this board.

@jozsefizsak 6 ай бұрын

That was quite overwhelming as the extent of the damage became evident. I'm beyond impressed that you were able to rescue this board. I don't recall anything about Shuttle after all these years but that seems like a very interesting and advanced board which makes the repair even more satisfying. Nice job!

@Epictronics1 6 ай бұрын

Thanks :)

@Linkintime1 6 ай бұрын

That was great to watch. I'm cheering this board on!

@adampope5107 6 ай бұрын

Our rotary tool came with an analog foot pedal to operate it with. I highly recommend getting one of those so it's much easier to control the speed of it while working.

@billcogneeto7286 6 ай бұрын

HOW ARE YOU SO PATIENT. I would go mad and I dont know what I would do after that lol.

@stephen.mcguire 5 ай бұрын

Wow, way beyond my patience

@enzito_sdf6978 6 ай бұрын

amazing series so far! honestly i didn't believe it was possible to get this board working, glad i was wrong. those leaky batteries man... so evil lol

@Epictronics1 6 ай бұрын

Thanks! Overclocking up next!

@OctavioGaitan 6 ай бұрын

I SO wanted to go to Computer Reset, but unfortunately, I was broke, and had no job, so I ended up missing out on a HUGE opportunity to nab some vintage computer stuff. Still, cool video, dude. :)

@Epictronics1 6 ай бұрын

Thanks

@richards7909 6 ай бұрын

This is just mind blowing. Fully deserved win for what at times must have seen impossible!

@catriona_drummond 6 ай бұрын

I love that I get a preview for the tool I have bough myself but not yet used. Bought the same Dremel and extension combo a few weeks ago, for various jobs, like also going at corroded PC cases. Seems to work f´great with the traces.

@Epictronics1 6 ай бұрын

It is, but it's a bit overpowered for trace cleaning. When I practiced on a scrap board, it went through the outermost layer of the PCB in seconds

@ejstacey 6 ай бұрын

Extremely satisfying. Congrats and well done! You're definitely riding that fine line between genius and madness.

@Epictronics1 6 ай бұрын

lol thanks!

@SireSquish 6 ай бұрын

Also that's amazing to watch you resurrect this board from probably the worst I've seen. Truly some epic PC necromancy.

@Epictronics1 6 ай бұрын

Thanks!

@user-ju2yl6bz9y 6 ай бұрын

Я бы хотел сказать, что это отличный ремонт, но не могу. По тому что это не ремонт, а вскрешение мертвого, очень многие за такую работу просто не взялись бы. Хорошая работа, одобряю.

@Epictronics1 6 ай бұрын

Thanks!

@rikomagicmk3842 5 ай бұрын

Man, I admire your work and level of knowledge.

@Epictronics1 5 ай бұрын

Thanks

@All_force 6 ай бұрын

I like your backdrop. Very scandinavian 👌

@kalsvtg5169 6 ай бұрын

You absolute madman! Gz on fixing this poor board! Reminds me of robocop oddly enough lol, after all it went through, it still boots and functions :p

@DisectUK 6 ай бұрын

You gave me inspiration to carry on my journey into electronics repair. As others have said that's one hell of a repair. A great watch.

@Epictronics1 6 ай бұрын

Thanks!

@charlesdorval394 6 ай бұрын

I would like to point out the Trident VGA card telling all of us to Foff.... hehehe Awesome work! I never thought that thing could be saved

@Epictronics1 6 ай бұрын

Thanks!

@charlesdorval394 6 ай бұрын

@@Epictronics1 If you could allow me a little follow up ... That PCB you tested your dremel on, (around 10:30) ... That IC just under TP10, WTH is that thing?!?

@Epictronics1 6 ай бұрын

@@charlesdorval394 That is an empty socket with a strange looking heatsink

@Freddy1036 6 ай бұрын

Wow great work. I have also have an opti 486 mainboard with an leaked battery and I didn't was able to do such a great job like you did

@Epictronics1 6 ай бұрын

Thanks!

@UpLateGeek 6 ай бұрын

Incredible work with this repair! I honestly thought it was going to be a futile effort, but once again you proved me wrong. It wouldn't surprise me if you could've got away with leaving a few of those bodge wires off around the SIMM slots, since they'd just be there to connect the address/data lines to those slots. I should definitely pick up some of those rubber bits for my dremel. I always thought it was way overpowered for this kind of work, but I guess it's not so bad if you're not using a hard abrasive.

@Epictronics1 6 ай бұрын

Thanks! You are right about the Dremel being overpowered for the task. Even at half-speed, I had to be very careful

@DerekPeldo 6 ай бұрын

Can't wait to see your overclock video so I can try and duplicate your results and maybe even go faster!

@Epictronics1 6 ай бұрын

You can always try! lol

@JenniferinIllinois 6 ай бұрын

DANG!!!! You got that board working!!!!!!

@Epictronics1 6 ай бұрын

You bet! VARTA isn't getting this one!

@Nas_Atlas 6 ай бұрын

Absolutely heroic effort in the service of retro computing! Amazing work. Thank you.

@Epictronics1 6 ай бұрын

Thanks!

@JVHShack 6 ай бұрын

This project might give Necroware a "run for his money," so to speak. This board was definitely dead, and, sadly, I was one of those people that rejected it. I'm happy that it went to the right person.

@Epictronics1 6 ай бұрын

Thanks :)

@Phoenix_Enterprises 6 ай бұрын

Haha, I have a crate full of boards ...a few 486 and one HOT shuttle for p2 lol. I figured I was the only one interested in this old junk. It takes love to do this stuff. Thanks for sharing.

@EKrieger Ай бұрын

👌👏👏👏👏 I watched the full video, amazing job what you have done. I have a 486 computer found on the garbage, complete, only thing that I see damaged (after fully cleaning it) is PSU with sulfate. But I have a more or less functional 386 with a very good psu working, I installed in the 486 but well 😅 it only runs CPU fan. I think that some day if I get to know more about these things or with help from anyone in my city the 486 might work well, because I swear it's in pristine condition. Doesn't boot or beeps but someday maybe. Thanks for the video and greetings from Argentina ❤

@Epictronics1 Ай бұрын

Thank you :) And good luck with your project!

@Wormetti 6 ай бұрын

"The flexible shaft is quite a bit larger than my old tool", Mark Fixes Stuff would be proud

@hansschwanz1097 5 ай бұрын

Dude this video was awesome ! Love that ps/1 boot Screen 😍 (still got my 486 PS/1, it was my first pc) On boot up, you can use the pause key, to freeze the boot up and read the stats. Works even on Boards from around 2010 ☺

@Epictronics1 5 ай бұрын

Thanks :)

@The-Future-Is-The-Past- 6 ай бұрын

wow. i am absolutely speechless. a board so badly damaged, components on it disintegrated is now in a state in which it somewhat works.

@Epictronics1 6 ай бұрын

Thanks. As far as I know it's 100% working now

@bikkiikun 6 ай бұрын

Congratulations on "another job well done".

@Epictronics1 6 ай бұрын

Thanks!

@Ojref1 6 ай бұрын

Computer Reset was right down the road from an arcade and pinball repair company that I used to work for when I was in high school. It also wasn't too far from Cyrix's old location either. I miss that place, and met Richard when he was a bit younger and CR had only been open a few years.

@Epictronics1 6 ай бұрын

cool. What was he like?

@sandmanxo 6 ай бұрын

Incredible. Funny thing is I was showing my wife the trace repairs and explaining that I've fixed a couple of traces on a radio before but nothing like that, and she was asking if it was a rare board. I was saying that vesa boards are somewhat rare since pci came in shortly after but just couldn't convey the message across of why to fix the board. Looking forward to seeing this board being overclocked to an inch of it's life in the future. It really makes me want to get a vesa board and get my old setup back in action, as my board died but I still have all the vlb cards and amd 5x86 cpu I used back then.

@minombredepila1580 6 ай бұрын

Incredible piece of work. It was a joy to watch. Savored every moment !!!!

@Epictronics1 6 ай бұрын

Thank you!

@AlejandroRodolfoMendez 6 ай бұрын

Congrats on getting everything fixed, it's gigantic task

@Epictronics1 6 ай бұрын

Thanks!

@EslamNawito 6 ай бұрын

IT'S ALIVE - Frankenstein

@timcross3461 6 ай бұрын

Thanks for the inspiration! I also have a different 486 board, with battery damage, that I tried to repair but got stuck at the POST 14 error. Think I will try to take the SIMM slots off and keep going...

@Epictronics1 6 ай бұрын

Good luck!

@warrax111 6 ай бұрын

This board should be named Frankenstein.

@HQSoundWebradios 6 ай бұрын

What a crazy job, well done

@Epictronics1 6 ай бұрын

Thank you

@theSoundCarddatabase 5 ай бұрын

Amazing video. I'm surprised that you managed to make it work again. Great job!

@catriona_drummond 6 ай бұрын

I'd like to congratulate you to the successful repair. What gets easily forgotten is the insecurity that travels along during these long hours of diligent repairwork. You never know whether it will be fixable at all until it's actually fixed. The doubts - what if the chipset is dead anyway? It's an excercise in mental strength to put so much work, effort and hope into something that will most likely not be coming back from the dead - and in many cases actually isn't. Congratulations again. a well deserved payoff.

@Epictronics1 6 ай бұрын

Thank you. I was sure I had failed twice during this project. I'm glad I didn't!

@GutBombTech 6 ай бұрын

Incredible! so good that you got it working. What a huge amount of work.

@Epictronics1 6 ай бұрын

Thanks!

@patrik3623 6 ай бұрын

Don't think I've heard you so excited about fixing things in any other video before. Good work!

@Epictronics1 6 ай бұрын

Thanks!

@Choralone422 6 ай бұрын

Fantastic work! I was amazed to see that board POST again and at the same time so happy! I can't wait to see what comes next with it!

@Epictronics1 6 ай бұрын

Thanks!

@planetbloodworldx7875 6 ай бұрын

That was a legendary repair!

@Epictronics1 6 ай бұрын

Thanks!

@diskettenfett3161 6 ай бұрын

Patience level: Over 9000! ;) Excellent repair!

@Epictronics1 6 ай бұрын

Thanks!

@genkidroid 6 ай бұрын

This has been a great series. A MB with this much damage ressurected from the dead. Thank you for sharing :)

@Epictronics1 6 ай бұрын

Thanks :)

@marquesdlr 6 ай бұрын

This is freaking amazing! Congratulations, a wonderful job

@Epictronics1 6 ай бұрын

Thank you :)

@seanabsher5577 6 ай бұрын

Man, great job on that board! I am impressed at your repair capabilities on that motherboard.

@Epictronics1 6 ай бұрын

Thanks!

@JohnGotts 6 ай бұрын

You are the man, resurrecting this piece of history. You tackle some of the toughest electronics repair work on KZfaq, and some really uncommon and unique stuff, too. I appreciate the rubber Dremel suggestion. I have a knock off portable unit I'll try with the rubber pads and see how I do.

@Epictronics1 6 ай бұрын

Thanks!

@esc2dos 6 ай бұрын

Fantastic work, enjoyed every minute of this. I'm just about to revive a similar 486 board with battery damage and it's great to see your success before I do. Looking forward to what you do next with it.

@Epictronics1 6 ай бұрын

This project is gonna go weird places :) Thanks

@thebyteattic 6 ай бұрын

I was sure you'd give up on this one. And then you made it work! Delightful!

@Epictronics1 6 ай бұрын

Thanks, sometimes I wish I would give up lol

@ApostleOfZeus 6 ай бұрын

Very soothing video, thank you

@craigrenwick9132 6 ай бұрын

Great win, it was great to watch

@Epictronics1 6 ай бұрын

Thanks

@BigBadBench 6 ай бұрын

Really nice work on those traces; incredible dedication! I had a 286 I was working on for doscember that took a long time to boot with bad keyboard traces too.

@Epictronics1 6 ай бұрын

Thanks John, I was surprised to find the keyboard controller could do that. I expected a bad crystal or clock multiplier chip.

@bozimmerman 6 ай бұрын

Well, that was crazy! I loved it.

@Epictronics1 6 ай бұрын

Thanks Bo :)

@notneb82 6 ай бұрын

OMG dude, you're a wizard! Great job! I have an old 386 board that is kinda like this one that I gave up on, if you have a PO Box I can send it to you and it's yours to do whatever with.

@Epictronics1 6 ай бұрын

Thanks :) Can you send me a picture of the board? at epictronicsyt@gmail.com

@helldog3105 6 ай бұрын

Excellent work. I have one of those Techmedia VLB boards that won't post if you want to try and correct the battery corrosion on it. You are welcome to it. When I got one that wasn't working the seller sent me a replacement that worked. He didn't want the bad one back, so if you want to take a crack at it and see if you can fix it, let me know.

@Epictronics1 6 ай бұрын

Thank you. I'm actually looking for a Techmedia case for a planned video. When I eventually find a case, I'd love to try to repair your spare board. Please send me an email at epictronicsyt@gmail.com

@helldog3105 6 ай бұрын

@@Epictronics1 I have three tech media cases as well, but they are all in use. I recommend seeing if you can find one of the desktop ones that has speakers built into the front of it. They are surprisingly decent sounding. I do have one of the tower cases that is not in use, but the shipping from the US would probably be life ending.

@Epictronics1 6 ай бұрын

@@helldog3105 That's actually what I'm looking for too. One of the desktop cases :) Let me know if you ever see one up for sale for a reasonable price. Shipping is not a problem

@helldog3105 6 ай бұрын

@@Epictronics1 if I see one I will let you know ASAP.

@Epictronics1 6 ай бұрын

@@helldog3105 Thanks!

@cfabz2023 6 ай бұрын

Awesome job ... and without schematics or extensive documentation! This was really a miracle that you pulled off.

@Epictronics1 6 ай бұрын

Thanks :)

@KrissBartlett 6 ай бұрын

your very smart man fixing that old board they are good i had one long time ago to same board as yours there

@Epictronics1 6 ай бұрын

Thanks :)

@cromulence 6 ай бұрын

Holy frig, that's a CRAZY repair. God tier. Good job.

@Epictronics1 6 ай бұрын

Thanks :)

@Paberu85 6 ай бұрын

Use Rose's alloy for desoldering, it mixes with regular solder nicely and lowers melting temperature to around temperature of boiling water.

@Epictronics1 6 ай бұрын

Interesting. I love that stuff for other applications, but never tried it for socket and slot removal. I'll give it a try

@user-9sidfgsxgj 6 ай бұрын

You deserve many more subs, great job!

@Epictronics1 6 ай бұрын

Thanks!

@SidneyCritic 6 ай бұрын

I would've got some fine stranded copper wire and pulled one out at a time, that way you can lay them exactly on the traces and they would be so thin you can put sockets on top of them. You can even put them through pin holes and there is enough room for the socket pins.

@Epictronics1 6 ай бұрын

That works great too. On this repair, I wanted to be able to move the wires around, while I was adding more wires

@Tommi-C 6 ай бұрын

You probably spent more time on that motherboard that the original designers did.

@christopherdecorte1599 6 ай бұрын

Amazing Getting that board working.

@Brooklyn727 6 ай бұрын

Simply incredible repair work

@Epictronics1 6 ай бұрын

Thanks :)

@maxtornogood 6 ай бұрын

That looks so bodgy but it was absolutely worth it to see that board going again!

@Epictronics1 6 ай бұрын

Totally worth the win!

@nickwallette6201 6 ай бұрын

A worthy case to put it in? Like a dumpster? haha :-D Not sure I would want to use that board even now, since every crash would make me wonder whether it was just another day in the life of a VLB board running an OS without protected memory, or something wrong. ;-) But... that was a heck of a puzzle, solved. You have my respect. 10/10 on the "because I can" scale.

@Epictronics1 6 ай бұрын

I kinda wish I had a really bad case in need of extreme repair. That would have been a perfect match :)

@ZUUL74 6 ай бұрын

What an amazing job! Thank you for the video

@Epictronics1 6 ай бұрын

Thanks!

@andrew1977au 6 ай бұрын

Well done!! What a mission 😊

@Epictronics1 6 ай бұрын

Thanks!

@supergoofy123 6 ай бұрын

Awesome. You have resurrected the motherboard. :)

@BrokeDad1 6 ай бұрын

Nice job on what was surely one for the scrap pile 👍 I usually use thinner wires than what you did (wire wrap size if anyone still remembers that) for running jumpers but hey it's whatever works you have on hand. After almost 40 years of doing this kind of work as a job though I'm looking forward to retiring soon. Stuff has gotten so teeny tiny anymore.

@Epictronics1 6 ай бұрын

Yeah, components are huge on these 486s compared to modern stuff. I use 30AWG wire with PTFE coating. It's easy to work with

@ruthlessadmin 6 ай бұрын

Wow, it almost seems like it would have been easier to design and build a brand new PCB lol! I admire your dedication. This would have gone into my soldering practice pile. Edit: my first and only socket 3 system had that graphical BIOS. I loved it...It felt so futuristic!

@Epictronics1 6 ай бұрын

Thanks!

@nickwallette6201 6 ай бұрын

I thought it was pretty cool back in the day, too. :-) Now, while I have a bit of nostalgia for it, the normal text-mode Award BIOSes are so much less tedious to use, and usually a bit less finicky. Goes to show, though .. put a fresh coat of paint on a jalopy and it'll get looks. haha

@ruthlessadmin 6 ай бұрын

@@nickwallette6201 I don't remember it being tedious at all but I was like 11 or 12 at the time. It was the first PC I built without help & with my own money, so I was certainly very biased & proud, blinded to any downside lol

@matthewday7565 6 ай бұрын

Heroic repair

@tassdesu 6 ай бұрын

Thank you. I like videos like that

@awesomecronk7183 6 ай бұрын

Epictronics indeed, wow!

@tommyovesen 6 ай бұрын

That was a great fix!

@Epictronics1 6 ай бұрын

Thanks Tommy!

@itsonlycayle 6 ай бұрын

Good stuff right here

@Epictronics1 6 ай бұрын

Thanks for the title suggestion :)

@JohnC5 6 ай бұрын

wow wow wow! great work!

@Epictronics1 6 ай бұрын

Thanks :)

@itstheweirdguy 6 ай бұрын

This is going insanely deep. What's the next level? Getting a custom PCB and moving all the components to it, effectively building a custom motherboard? Maybe even fix a bug!

@Epictronics1 6 ай бұрын

That would be sweet. I'd better start learning how to design PCBs

@ricardog2165 6 ай бұрын

Next let's replace a South Bridge chip with a custom FPGA!

@JapanPop 6 ай бұрын

That was crazy and amazing! I love it. Thanks!

@Epictronics1 6 ай бұрын

Thanks :)

@TheSimTetuChannel 6 ай бұрын

The partition label on that drive! ADAVIS is an evil wizard from the Quest For Glory series from Sierra.

@Epictronics1 6 ай бұрын

Oh, man, I wish that drive hadn't been cleaned. It probably had some Sierra goodness on it back in the day

@fra4455 6 ай бұрын

Great video✌

@Epictronics1 6 ай бұрын

Thanks!

@fra4455 6 ай бұрын

@@Epictronics1 thanks

@arnlol 6 ай бұрын

That was some crazy damage, I think most people would have given up but you didn’t and it paid off! Interesting how that board wouldn’t even allow boot without the battery

@Epictronics1 6 ай бұрын

Thanks. I think I only have one other board with the same boot issue

@miscellus_com 6 ай бұрын

What a triumph! Great work (^:

@Epictronics1 6 ай бұрын

Thanks :)

@hugosimoes5119 6 ай бұрын

Fantastic job. I put a like regardless of the content. Always entertaining. It wasn't an easy task but you did it. I wish I had better eyes like I used to have ages ago, or I would try to fix a pentium board where I tried to replace the AT keyboard connector with a PS/2 keyboard connector and screwed up things. Pentium and 386/486 got expensive over the last years. They cost too much and ebay shippings aren't compelling. I wonder if there are websites that have high resolution schematics of old motherboards. I mean... an high resolution photograph of the bottom of the motherboard and top, so we could see perfectly the traces. Such sites could help us fixing motherboards instead of relying on video footage.

@Epictronics1 6 ай бұрын

Thanks. There is a webpage with pictures of vintage motherboards. Unfortunately this revision of the board (R1) seems rare. I haven't been able to find any picture of it at all.