Help with a Socket 3 board \ VOGONS

Help with a Socket 3 board

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First post, by touche112

Posted on 2021-10-19, 01:11

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Picked up a PAT48PR a few weeks ago. I'm having a lot of trouble figuring this thing out.

It doesn't POST - I get three beeps instead. It uses AMI BIOS, so, base 64k RAM failure. So far I've tried two different sets, some 30pin and some 72pin. Jumpers are set correctly across the board. Swapped out cache, and tried no cache - same error. Also tried VLB and ISA video cards, too. Only component I haven't swapped is the CPU.

Any suggestions on what to try next? Here's the link to the manual I've been using: https://stason.org/TULARC/pc/motherboards/T/T … PR-VER-1-4.html

Reply 1 of 10, by Warlord

Posted on 2021-10-19, 04:44

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battery might be dead, and it's common for old boards to not post with a dead battery. You can hook up a external battery to this board.

Reply 2 of 10, by Anonymous Coward

Posted on 2021-10-19, 05:07

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Try applying pressure to various chips during post to see if anything changes.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 3 of 10, by Deksor

Posted on 2021-10-19, 06:58

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Make sure the ram is FPM and not EDO memory

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

Reply 4 of 10, by Anonymous Coward

Posted on 2021-10-19, 12:10

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He already said he tried 30-pin RAM, which doesn't exist as EDO as far as I know.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 5 of 10, by touche112

Posted on 2021-10-27, 20:59

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Ok so I replaced the battery and also tried a battery hooked up to the external header. No go. Pressure on various ICs didn't change anything either.

I took another look and can't see any trace damage either 🙁

Reply 6 of 10, by Deksor

Posted on 2021-10-27, 21:21

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Could you send us a good quality picture ?
Maybe someone with experienced eyes could see a problem you haven't caught ?

I'd also be interested by a picture to add it here : https://www.ultimateretro.net/motherboards/4951

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

Reply 7 of 10, by touche112

Posted on 2021-10-28, 00:51

touche112 Offline

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Deksor wrote on 2021-10-27, 21:21:

Could you send us a good quality picture ?
Maybe someone with experienced eyes could see a problem you haven't caught ?

I'd also be interested by a picture to add it here : https://www.ultimateretro.net/motherboards/4951

Yes of course, I will get pictures of the board throughly and post an update.

Reply 8 of 10, by Anonymous Coward

Posted on 2021-10-28, 15:15

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Did you lift up the keyboard controller to check the traces underneath?

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 9 of 10, by touche112

Posted on 2021-11-05, 01:15

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Ok got it figured out! Found a spot on the underside of the board where there was a chunk of the PCB missing. Previous owner must've knicked it on the case or something. Repaired one trace and we're up and running.

Before:

After:

Ignore the burned flux. It's cleaned up now and I put some solder mask on there too.

Here's some pictures of the board in general: https://imgur.com/a/87opJpd

Reply 10 of 10, by Deksor

Posted on 2021-11-05, 20:05

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It's been added, thank you very much !

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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