First post, by feltel
It seems I do not have any luck in getting an working 486-era mainboard. I got an PAT48SA-1.30, which is an ISA-only 486 DX50 board, but it looks like it is dead. 🙁
I snipped the Varta battery as it was in the beginning of leaking. The leakage was only minor and most of the acid went into the keyboard connector. I took it of to check if there were traces underneath. But I was lucky and it seems the leakage does not caused any harms. But at the initial power on the 12V tantal blew up and the board did not post. No picture, no beep, nothing. I switched the RAM modules but even without any RAM no beep.
I dont know if the tantal is essential for operation but according to my cheepo ISA postcode card the 12V rail is still there. So I assume the cap is only for smoothing.
Is there anything I should/could check to get this board alive again? I checked the jumpers/resistor networks but it looks they are correctly set for the installed CPU.