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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

iMac - My iMac G5 1.6 Ghz Won't Boot. Shuts Down at Gray Screen. HELP!

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Member Since: Jul 09, 2007
Posts: 2
acleme1 is on a distinguished road

acleme1 is offline
Hi guys. I need some help. I have an iMac G5 that seems to be having some serious problems. It is a 17" 1.6 Ghz w/ 1GB of RAM.

The problem:
When I press the power button, I get the beautiful Mac chime, and the LCD turns on to the gray apple screen. I get the spinning gray bars below the apple, and shuts down. Sometimes it doesn't even make it to the gray screen and it shuts down.

What I have done recently/tried.
I installed iLife '06 and all the updates a day or two before this began.
I reset the PRAM.
I tried booting in luck.
I tried starting from the factory CD. The drive begins to spin, and then it shuts down.

When this first happened (yesterday), I started it in safe-mode, and everything looked ok. I zapped the PRAM, and then started it up, and once again, everything looked ok. That was last night. When I got home from work tonight, none of those things worked, and I am now looking for some help from you guys. Any suggestions? Thanks, in advance, for the help.

BTW, I think I'm running 10.4, but I'm not certain because I can't start it up to tell.

I also just tried resetting the SMU. I got past the gray screen to the blue screen, and then WHAMO - it shut down. That's the farthest it's gotten today, though. Any ideas? Thanks again, AC.
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Member Since: Jul 31, 2007
Posts: 1
overgaardcom is on a distinguished road

overgaardcom is offline
Did you find a way to solve this problem. Because I have the exact same problem with my iMac G5 20" today...
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Posts: n/a

Hello to both of you and welcome.

Check out the links in this post, it might help both of you.
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Member Since: Jul 14, 2007
Location: Sioux Falls, SD
Posts: 17
Jazzdall is on a distinguished road
Mac Specs: MacBook Pro 2.4GHz 4GB Ram 320GB HD

Jazzdall is offline
I had this problem with my iMac G5. Let me say this, i hope you have a warranty. I took mine to the dealership and it was under warranty (thank god) because they replaced the logic board.
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