TECHNICAL SOLUTIONS

Extreme 486 VLB board repair. Found at computer Reset

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: https://youtu.be/sm4uosUD_zU?si=O2E8zbr7Fb162eXq
Severely battery damaged Shuttle HOT-419 R1 Motherboard.

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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: https://twitter.com/epictronics1
Music by Karl Casey @ White Bat Audio

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28 thoughts on “Extreme 486 VLB board repair. Found at computer Reset

  • 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

  • What is the difference between the shorter and longer cache chips??

  • Concerning the battery, does the ~0.6 voltage drop cause any issues?

  • What an amazing job! Thank you for the video

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

  • 30:50 you can click "exit without save" and computer should boot futher even without the battery

  • I like your backdrop. Very scandinavian 👌

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

  • 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…

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

  • 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

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

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

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

  • Why not use enameled speaker wire to run replacement wires along the broken traces? Was that just an issue of tediousness?

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

  • 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.

  • Very nice video and huge work in restoring it ! I find it weird that the BIOS reports only 3700K of RAM at boot up. Usually you should get higher than this when 4 MB SIMMs are installed…

  • 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.

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