Found this board in storage among other non-working boards and wanted to diagnose it. It was missing a keyboard controller chip so I installed one. It was also missing four jumpers which I installed as well.
Now, what I find interesting is that it doesn't POST and doesn't produce any beeps. Am I missing something obvious? I tried it with several 486DX2-66 chips from ST, AMD and Cyrix.
Check basics;
- Visual overview, any clear damage
- CPU voltage
- is the oscillator doing it's thing (present on the FSB-pin on the socket).
- Are the socketed IC's correct
- Is the bios corrupted or not.
Do you have an POST analyzer card?
The battery in the Dallas chip is almost certainly dead. I know some motherboards don't like to turn on with a dead battery, but I'm not sure how common that is with a board of this era. Still worth considering though.
Half-Saint wrote on 2024-04-16, 09:38:Found this board in storage among other non-working boards and wanted to diagnose it. It was missing a keyboard controller chip so I installed one. It was also missing four jumpers which I installed as well.
Now, what I find interesting is that it doesn't POST and doesn't produce any beeps. Am I missing something obvious? I tried it with several 486DX2-66 chips from ST, AMD and Cyrix.
My guess is the Bios. Somebody fooled around with it, there is no sticker.
Without a Bios a mainboard is dead like a stone.
So re-program it and see.
Edit:
Wait.... "Found this board in storage among other non-working boards ..."
What does that mean exactly? Your storage? So it is the first time you try to run it?
CoffeeOne wrote on 2024-04-16, 18:26:My guess is the Bios. Somebody fooled around with it, there is no sticker. Without a Bios a mainboard is dead like a stone. So r […]
My guess is the Bios. Somebody fooled around with it, there is no sticker.
Without a Bios a mainboard is dead like a stone.
So re-program it and see.Edit:
Wait.... "Found this board in storage among other non-working boards ..."
What does that mean exactly? Your storage? So it is the first time you try to run it?
Yes, I believe it's the first time I'm trying to get it to run. I got this around 5-10 years ago together with several other untested boards. Some of them actually worked. BIOS is a good idea but I tracking down a bios for this board could be tricky.
https://theretroweb.com/motherboards/s/shuttl … ot-433-ver.-1-3 and here you have a few BIOSes as well
oh2ftu wrote on 2024-04-17, 05:04:https://theretroweb.com/motherboards/s/shuttl … ot-433-ver.-1-3 and here you have a few BIOSes as well
Ah thank you. I'll check it out as soon as I have some free time.
