Update: Still no PRAM battery but I thought I would try a couple suggestions to see what happens. I opened the machine up and unplugged the hard disk, floppy drive, VRAM, and both RAM chips (leaving only PSU, fan, and speaker attached). Then I plugged it in to the wall and tried the power switch.
No luck - fan didn't spin, speaker made no noise aside from that incessant clicking. I checked over the board for some evidence of damage or capacitor troubles, but didn't find anything obvious (it's really clean in there!) Also disconnected and reconnected the power supply to the board just to see if the pins were not making good contact... didn't help.
Powered on again, waited 5 minutes or so, then tried quickly cycling the power. Still no boot.
Next up: I will go ahead and check the pins on the power supply to see if they are putting out proper voltage. Also will install the PRAM battery when it arrives and then try booting. Maybe there is something else I am missing...
No luck - fan didn't spin, speaker made no noise aside from that incessant clicking. I checked over the board for some evidence of damage or capacitor troubles, but didn't find anything obvious (it's really clean in there!) Also disconnected and reconnected the power supply to the board just to see if the pins were not making good contact... didn't help.
Powered on again, waited 5 minutes or so, then tried quickly cycling the power. Still no boot.
Next up: I will go ahead and check the pins on the power supply to see if they are putting out proper voltage. Also will install the PRAM battery when it arrives and then try booting. Maybe there is something else I am missing...