UC4915 no POST code \ VOGONS

UC4915 no POST code

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First post, by Deksor

Posted on 2016-10-01, 13:34

Deksor Offline

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I've bought a few month ago a broken UC4915 that had a leaky battery. I repaired the traces but the mobo didn't POST. Now that I have a POST card, I checked if there was'nt any error code, but the 2 displays are remaining completely blank ... (I checked to see if it was working on other motherboards and it's fine)

Is my board completely dead or could the issue be related to the UV-ROM that lost its sticker (even though I dumped it and it seemed to be okay)

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

Reply 1 of 4, by h-a-l-9000

Posted on 2016-10-01, 13:39

h-a-l-9000 Offline

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Maybe make some pictures of the damage. Sometimes the corrosion can break traces almost invisibly. You can try BIOS from other boards, it may at least put some POST codes.

1+1=10

Reply 2 of 4, by Deksor

Posted on 2016-10-01, 13:44

Deksor Offline

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Here are some photos (from my other topic about that card)

This is what I thought to do, but I don't really know how do I do that with a smaller ROM wich can't be erased electrically like the ones that you come across on late pentiums/pentiums 2 and 3 and that has 4 more pins

I also changed the 14.xxx MHz quartz because I thought that I may be broken but it's still the same.

Also some chips are heating up (the CPU too) just like normal

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

Reply 3 of 4, by h-a-l-9000

Posted on 2016-10-01, 16:28

h-a-l-9000 Offline

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Your BIOS socket is also corroded. And probably also the keyboard controller socket.

1+1=10

Reply 4 of 4, by Deksor

Posted on 2016-10-22, 20:10

Deksor Offline

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Okay so I tried to clean this with alcohol, but it did not seem to have changed anything :s

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

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