Previous 1 2 Next 15 Replies Latest reply: Oct 21, 2013 2:03 PM by BDAqua
twangersix Level 1 Level 1

After being switched off /disconnected for 7weeks the G5 would not power up when I switched on .


There are relay clicks ,and mains light on both computer and display switches when pressed ,but no "powering up " fan sound .


Advice from this site got me to replace the 3.6 lithium battery ,which I did today .To no avail .


The symptoms remain the same ,clicks but no fan ,and display screen remains blank/black .


Help welcomed .

PowerMac, Mac OS X (10.5.8), logic pro 8 . G5 !.8 PC1-X with +
Solved by BDAqua on Oct 20, 2013 11:38 AM Solved

Aw geez, sounds like these listed in order of likelyhood...



Switch unit

Logic Board.

Reply by BDAqua on Oct 17, 2013 2:16 PM Helpful

Try disconnecting power & all peripherals for an hour or two, hook power only back up & see if anything starts.


How to reset the SMU/PMU on a Power Mac G5 (Late 2004) or Power Mac G5 (Late 2005) ...


Earlier G3, G4, G5 models...

Reply by BDAqua on Oct 17, 2013 4:07 PM Helpful

OK, it's a long shot, but do let us know please.

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