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techgeek 05-05-2011 09:11 PM

Power Mac issue
 
I have a dual mirror door power mac g4 that I got for free that I am looking to repair. When I press the power button on the computer the fan start but almost immediately stop. nothing happens on the screen. additionally a red light on the inside flashes when the fans are spinning. I swapped the battery on the logic board with a new one the only difference is the fans spun a little longer than before but still did not boot. Any help would be much appreciated.

baggss 05-05-2011 09:16 PM

Have you checked that the RAM is:

-Seated properly?

-Even present?

-Any good?

techgeek 05-05-2011 09:29 PM

yes to all 3 I removed the ram then put just one in then switched them to test to see if it was just bad RAM( It has 2 RAM ) but it made no difference.

baggss 05-05-2011 09:31 PM

Could be bad RAM.

The red light means something, I'd Google that symptom along with the machine model and see what comes up.

techgeek 05-05-2011 09:47 PM

The red light just means that it is on however the light is on less than a second so I would safely assume that the computer is not running after the light is off.

harryb2448 05-05-2011 11:05 PM

Sounds like a bad Power Supply Unit (PSU). Have a look at this thread and check out the options for examination and replacement.


Bad Power Supply? MDD G4 trips APC overload circuit... - MacRumors Forums


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