Unable to start my g5 stuck on grey screen

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Level 1

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Unable to start my g5 stuck on grey screen

Turn on Mac goes to grey apple screen cog wheels spins but its stuck there tried control option p and r doesnt do anything tried turning it on while holding shift key to try and get it in safe mode but that does not work either. Any suggestions would be appreciated.

iMac, Mac OS X (10.4.11)

Posted on May 8, 2012 7:17 AM

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Answer 1

Paul_31

Level 6

14,160 points

May 8, 2012 8:54 AM in response to Knight212

You should have better luck re-posting in the following link as this is the iMac Intel forum and G5's are PPC:

https://discussions.apple.com/community/desktop_computers/imac_powerpc?view=disc ussions

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Answer 2

May 8, 2012 9:05 AM in response to Knight212

This forum is for intel imacs.

You might get more replies in the power pc forum.

https://discussions.apple.com/community/desktop_computers/imac_powerpc

You can try doing a PMU reset (Power Management Unit)

Turn off the computer by choosing Shut Down from the Apple menu, or by holding the power button until the computer turns off.
Unplug all cables from the computer, including the power cord.
Wait 10 seconds.
Plug in the power cord while simultaneously pressing and holding the power button on the back of the computer.
Let go of the power button.
Press the power button once more to start up your iMac.

Note that this will only work on some G5 iMac models. I don't know what model you have.

See these articles for more info.

http://support.apple.com/kb/HT1767

http://support.apple.com/kb/HT2173

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