TMC PAT48PG 486 VLB motherboard troubleshoot \ VOGONS

TMC PAT48PG 486 VLB motherboard troubleshoot

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First post, by ReeseRiverson

Posted on 2015-01-20, 01:41

ReeseRiverson Offline

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I've stored this motherboard away for several months, and when I last tested it, it worked just fine. Well at least booted up.

Now it doesn't seem to want to do anything, the only thing I've done since was remove the RAM to test in another machine, and that was all I've done.

Though upon some more investigation, I found it to not like my S3 805 VLB GPU... I tried a Western Digital 90C33 VLB card, but the screen remains blank still, but it actually boots up, and goes through the floppy seek and gave the initial beep... so I tried a Western Digital WD90C30 ISA card... error beep code... and lastly, I go for my Trident ISA card, and instantly get the VGA BIOS boot on the screen and the system booted up, I could get into the BIOS and actually see what I am doing!

So I guess the VGA boards I have may be bad or something? Or some compatibility issue or setting issue on the board for VLB boards?

Right now I am trying to find a working or compatible I/O controller with IDE/FDD. I thought I had a VLB one here somewhere but for now the ISA one I tried, it had some IDE and FDD error when trying to boot, yet oddly it still detected the HDD with out issue in the BIOS. Weird. 🤣

Reply 1 of 4, by Anonymous Coward

Posted on 2015-01-20, 05:06

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I never got the impression that the quality of the TMC boards was particularly great, and they always seemed poorly designed too.

"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 2 of 4, by ReeseRiverson

Posted on 2015-01-24, 21:24

ReeseRiverson Offline

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Hmm, I hope I can still make due with this board.

I found my Promise EIDE 2300Plus VLB I/O controller. And my Orchid Technology VLB GPU...

But absolutely NO VLB GPU seems to work... and as for my Promise VLB I/O card, it has two IDE headers... one that operates off the ISA bus, and one that operates off the VESA BUS. And so far, I am not having luck with the VESA side. Just the ISA side.

Could there be some freaky reason that's makine VESA not working?

Reply 3 of 4, by Anonymous Coward

Posted on 2015-01-25, 00:21

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Are all the pins in the slot still present, and are they clean?

"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 4 of 4, by ReeseRiverson

Posted on 2015-01-25, 02:23

ReeseRiverson Offline

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Yeah all the pins seem to be present and the whole board is reasonably clean. I do recall testing it once a while back with a VLB gpu and it worked. I am not sure what'd be different now, unless there's some jumper setting effecting everything. 😵

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