Dead Power Mac G4

Dead G4

My G4 did that a couple of years ago. This is what fixed it:
http://docs.info.apple.com/article.html?artnum=95037
Resetting the PMU on the Logic Board. Hope this helps.

Terry

 

Also it may be time to install a new PRAM battery.

1/2AA 3.6 V Lithium cell Should be about $12

 

If it is a dead PRAM battery the power light usually flashes when pressed but you get no response.

Replace it just like CanadaRAM said.

 

Radio Shack

 

Is there a way to test the power supply to verify it's putting out the proper voltage?

 

If you press the power botton on th efront of the G4 and the light comes on but it goes off as soon as you stop pressing it and the ir no boot sound. Your processor card is not screwed securelly to the motherboard, tighten the screws on the processor card *CPU disconected and properly grounded so you dont kill the MLB with static and your G4 will be good again.

 

Does the power supply have its own fan? If that's not running, then there's your problem.