Hello all, I have a decent looking Power Mac 7500/100 that I picked up recently. I did a little cleaning on the exterior, blew out the dust bunnies and powered it on only to find that it won't boot. The power supply clicks on, power LED on the front works, keyboard LEDs blink, HDD spins up, CD drive ejects but no startup chime (or any sound) and no video.
I have tried the following:
Swapping/removing the 4 memory modules.
Removing the PRAM 3.6v battery on the board (tests 0v, dead).
Pressing the button on the board under the CPU card.
At this point I will be doing a little more research. I did find an Apple service guide covering the 7300+ series that I started looking through.
A few questions for the community here:
I did notice that the ROM SIMM is not present, is this required to boot? My searches give mixed results (maybe only required on 9500?)
Also not sure if the PRAM battery has to be present to boot? (Have a few on order in the meantime)
At my disposal I have a working 8500/120 and working desktop beige G3. My next step is to try and use the 601 CPU card in the 8500 (if this is supported?), and maybe the working G3 power supply in the 7500. I'm hesitant to try any working parts in the 7500 in case the power supply is damaged and kills my working card.
I wont be able to tackle this until the weekend but wanted to get some preliminary direction until then.
I would appreciate any suggestions, comments or help you may offer.