Question about Apple 24" iMac Desktop

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Startup computer and all of desktop is there. then the screen goes to blue and then back to normal. This continues to repeat over and over. Any ideas? Warren

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Hi,
You may need to restart the PRAM and NVRAM:
Resetting PRAM and NVRAM

  1. Shut down the computer.
  2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
  3. Turn on the computer.
  4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
  5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
  6. Release the keys.

Posted on Dec 14, 2010

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