Question about Apple iMac G4 Desktop

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Computer won't start up correctly

When I start the computer, it goes to the gray Apple screen with the little circle that keeps going around and stays there forever. I tried starting it up in Safe mode by pressing the shift key when I started it. It went to the same screen and the little circle went around for maybe about 20 minutes and then went to a blue screen with the circle still going around. Finally it is at a blue screen with nothing on it at all except the mouse arrow. What do I do now to solve this problem.

This problem started when two days ago it accidentally became unplugged and we tried starting it again.

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Considering you have tried the Safe Boot mode to correct this, try to resolve this from the hardware side:

Procedure #1:

Here are some steps you can try to resolve the issue:

• First, hold in your power button for approximately 10 seconds to do a hard shutdown, if you have not already turned your Mac off.

• Once your Mac is shutdown, you will need to perform what is called a PRAM reset (Parameter RAM)

• Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously .

• Turn on the computer.
• Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.

• Now, hold the keys down until the computer restarts and you hear the star tup sound for the third time.

• Release the keys and allow the Macbook to start up.
If the iMac still does not start up to your Desktop correctly, go on to the next procedure:
----------------------------------------------------------------------
Procedure # 2

-PMU RESET-

The Power Manager is an integrated circuit (computer chip) that is usually on the logic board of your Mac computer.

It is responsible for power management of the computer. It controls backlighting, hard disk spin down, sleep and wake, some charging aspects, trackpad control, and some input/output as it relates to the computer sleeping.

• If the computer is on, turn it off.
• Disconnect all the connections going into the Mac except for the Power cord.
• Once all connections have been disconnected, remove the power cord from the iMac.
• Wait 1 minute.
• Reconnect the keyboard, mouse and power cord back into the computer.
• Press the Power button to restart the iMac computer.

• Observe if it starts up to the main desktop this time.
If it does not however, you may have an issue with your current Mac OS X directory or the issue could be hardware related.
-----------------------------------------------------------------------
Here is a comprehensive reference for you regarding Additional Troubleshooting for Blue, Gray screen issues and more, that you can also review:
Apple Support Link:
Startup Issues for Macs
----------------------------------------------------------------------
If all else fails, you may need to visit your local Apple retail store Genius bar or local Apple-authorized service center in order to have your iMac at least diagnosed to find out what the core issue is.

Regards,

-Mactechtrainer


Posted on Jan 31, 2010

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