agentb
Experienced Member
I recently acquired an IBM P70 portable which I would love to get working. It posted intermittently the first time or two I turned it on and got some error codes in the 161-165 realm (can’t remember exactly which ones). Then it would only post if I let the machine sit for hours. Now it won’t post at all. Lithium battery has been removed so presumably CMOS is blank/garbage. I checked caps in-circuit with an ESR meter and nothing jumped out at me. But they could still be bad I assume. Caps are electrolytic, not surface mount like on the P75. Floppy caps (SMD) are definitely bad, I saw visible leaking, so that’s a problem for the future. Power supply readings all look good.
Any suggestions on what to try next? I was planning to recap the planar board (and plasma board?) as I’m not sure what else to do. I know I need to use the reference floppy to set the CMOS correctly once I can get it to post again.
Any suggestions on what to try next? I was planning to recap the planar board (and plasma board?) as I’m not sure what else to do. I know I need to use the reference floppy to set the CMOS correctly once I can get it to post again.