I got a Powerbase 200 and it needs some help. The case was in bad condition, but amazingly there is no corrosion or visible issues on the CPU card, logic board and riser board. It was dirty, but otherwise in seemingly good shape. After a thorough cleaning with IPA and waiting a few days to dry, I tried to start it up with it all assembled outside the case. The power light came on, as well as the case and power supply fan, but no chime and no video. I replaced the PRAM battery as I heard they might not chime without that, but still no chime or video. I reseated all the cards and even tried a new known good power supply, but still the same issue. I replaced the RAM, again checking for anything, but no boot.
At this point I've reseated cards and switched any parts I could, but still just the power LED and fans spinning, but nothing else. I even switched out the speaker, but no chime. I've gone over all the boards and don't see any leaking caps or otherwise bad components or traces. The CUDA button seems to do nothing. Removing any boards, including cache does nothing.
Anybody have ideas where I look next?
At this point I've reseated cards and switched any parts I could, but still just the power LED and fans spinning, but nothing else. I even switched out the speaker, but no chime. I've gone over all the boards and don't see any leaking caps or otherwise bad components or traces. The CUDA button seems to do nothing. Removing any boards, including cache does nothing.
Anybody have ideas where I look next?