Question about Apple Power Mac G5 Desktop

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PM G5 has red light at front before switching on

I have a 2GHz PMG5 with 1GB RAM. It is not starting up. When I connect power to it, a red and orange light come on at the front. When I switch on, more lights come up but there is no start up gong and no display. The fans kick in but that's all. Yesterday after a while the fans began to run faster, making more noise than before so I switched the computer off by pulling out at the plug.

I remember reading somewhere before and someone said it is a logic board problem. Is this so? Please advise so that I order a new motherboard if that's what I need to replace.

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You should take your Mac problems to the Apple Discussion board - http://discussions.apple.com/forum.jspa?forumID=596 - There's tons of very helpful information there from very experienced users.

Posted on Jun 10, 2009

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It could be your motherboard but I would first try a Apple hardware disk and run the diagnostic tests.  If you can't boot from the DVD you could try a PRAM reset.  I have seen other weird issues with the hard drive not mounting which causes the fans to run loud.  The Apple Diagnostic disk comes in your original software pack and its usually on the 2nd or 3 DVD.  Sometimes the CPU speeds get out of whack and they need to be recalbrated. 

Posted on May 02, 2009

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Thank you for contacting Fixya Support, I am glad to assist.

There are a few steps you can try to troubleshoot this issue:

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