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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Notebooks > My ibook G4 turns on but doesn't starts up

My ibook G4 turns on but doesn't starts up
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Fresh-Faced Recruit
Join Date: Mar 2010
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Mar 22, 2010, 03:43 PM
Ok, I have a problem with my ibook G4 12 inches, Mac Os X Leopard 10.5.8, 1.33 GHZ and 1.5 GB of Memory.

The problem is that when I turn on my iBook it turns on and it shows the apple logo and the charging icon after that, it shows three blue screens (all this is normal), but the problem is that after the last blue screen it doesn't show my desktop because it stays in the third blue screen. It only show the pointer with the spinnig wheel and it doesn't pass to the start up process and I can't do anything. I try to start up with the command key pressed to choose another start up volume but if I try it the screen doesn't turn on although I can hear the start up chime and the fan. And also the gray screen that appears after press the turn on/off button has lines from up to down in all the screen and also the apple logo has lines from up to down inside it.

Do you understand me?

Please help
Clinically Insane
Join Date: Oct 2000
Location: Los Angeles
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Mar 22, 2010, 03:49 PM
It sounds like an OS problem. See this Apple Support article:

OS X Startup Troubleshooting

"The natural progress of things is for liberty to yield and government to gain ground." TJ
Moderator Emeritus
Join Date: Apr 2005
Location: Cambridge, UK
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Mar 22, 2010, 04:03 PM
Sounds like it could be the memory controller with a bad connection. Symptoms were blank screen with fan running full blast on boot though. I'm aware of this issue with 800mhz G4s, not sure if they changed the board layout in the last gen 1.33ghz.
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Join Date: Oct 2001
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Mar 25, 2010, 07:23 AM
Try holding command-V and see what the display says.

Can you boot into single user mode (Command-S)?

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