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  1. #1

    Member Since
    Mar 18, 2011
    Question iMac G5 won't recognize keyboard or mouse. Heat Related
    Hi Folks,

    I have a G5 20" iMac 2005 with the following problem.

    The keyboard and mouse will stop working after computer warms up or is used hard. Then the "You must restart...." message appears. The LED on the mouse still works when it can't be recognized.

    What I have done:

    Reset PRAM
    Reset SMU
    Reinstalled OS on new hard drive.

    Fans operate normally and Diagnostic LEDs on logic board read normal. Processor over temp LED doesn't come on.

    Computer will work all day long in 50 degree room temperature, but not in 70 degrees.

    Anybody been here before? Ideas?



  2. #2

    Member Since
    Mar 18, 2011
    Problem solved
    Problem solved but not sure why.

    Removed logic board and inspected bottom side. Inspected all capacitors and heat sinks for fit. Everything looked great. All connectors were tight and clean. Reassembled and powered up. iMac now runs fine.

  3. #3

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Nambucca Heads Australia
    iMac i5 2.7GHz, 16GB memory, OS 10.11.1.
    Much dust inside which may cause your problems?
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

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