First post, by quicknick
- Rank
- Oldbie
So I got this board together with an AMD 5x86/133, visually everything is ok, a couple of scratches but nothing serious, no broken or shorted pcb tracks. There was a barrel battery (NiCd or NiMH) only soldered in one end, and on closer inspection I noticed it was soldered backwards (positive pin to the board's negative, and negative pin left floating). After searching the net for pictures of this board I found out that originally it was fitted with a non-rechargeable lithium battery so I soldered a CR2032 holder, checked to see if the board doesn't try to charge the battery (it doesn't), so everything looking ok I fitted the VGA, RAM, speaker and powered it. Nothing, not a single beep.
Tried with PCI and ISA video cards, different (mostly FPM) SIMMs, even without video card and/or RAM. A fellow collector was kind to help me so we tried the board with his Intel DX4 and some of his RAM, no luck.
Today I re-capped the board (all caps, even the 20-something small ones) and I even de-soldered the CMOS chip, thinking it might be damaged by the misfitted battery and somehow preventing the board from POSTing. Nothing helped.
The things that should get warm (CPU, chipset, cache chips, VRM) do get warm, VRM output is at 3.43V.
Any more ideas, or is this board history?
Thanks.