I have a formerly working Mac II that was stored for a few years and when retrieved would not turn on again. I became aware of the PRAM battery situation and around here was only able to get my hands on 3.6V 1/2 AA batteries rather than the 3V soldered to the motherboard. Anyway, I tried connecting them anyway (they have the little pieces of wire soldered to each end, so I soldered them to the remains of the old wire I'd clipped the old batteries from. I've confirmed voltage is getting to those wires and thus the mainboard, but neither by switch nor by the keyboard would the machine power up.
I then took a third battery I had and did the jumpstart procedure to the white wire on the PSU connector. Sure enough, the PSU fired up, but there is no Mac chime, and the second the battery is removed, the PSU shuts off. Holding it in place for a while produces no activity.
I've pulled the board and inspected it.. it is in excellent, clean condition. I don't see any evidence of cap leakage anywhere and the traces all look good. Wondering where I can go from here?
Any assistance would be greatly appreciated!!