First post, by MMaximus
I got this board "naked' in a lot a while ago - no BIOS chip, no CPU, no RAM, no oscillator, no Cache.
It looks really good optically, maybe never even used, so I thought it would be a matter of filling in the blanks to make it POST...
What I've done so far:
Tried with two different CPUs (i386DX25, AMD386DX40), both working in other boards.
Tried with two different oscillators (50Mhz and 80Mhz), both working in other boards.
Tried with 4x 1Mx9 SIMMS in BANK 0, working in other boards.
Tried with BIOS image from matching board from the Vogons 386 Bios image collection thread, burned onto a W27C512-45Z EEPROM.
No luck so far - I'm wondering if it refuses to post because the cache sockets are not populated? I can't find a jumper to disable cache, only some to change the cache size (from 64k to 256k). I recently "restored" a HOT-307 386 motherboard, and it POSTs without problem even when the cache chips are not present... so I find it weird this would be a requirement.
Another possibility would be the BIOS image being incorrect? Or some physical damage to the motherboard that I can't see.
The diagnostic card doesn't show any error code: only "----".