iMac monitor doesn't light up

Posted:
in Genius Bar
My 27" iMac won't light up. It 'bongs' when I reboot and gets warm but otherwise nothing works.  I can't access it from another iMac. 

Any suggestions will be gladly received. 

Thanx

Comments

  • Reply 1 of 2
    sequitursequitur Posts: 1,910member
    I still have the same problem with the 27" iMac; however, after several reboots, I can now access it from another iMac. It's dark but evidently operating in some manner. 
  • Reply 2 of 2
    Mike WuertheleMike Wuerthele Posts: 6,861administrator
    GPU or Screen. Have you tried connecting it to an external display?
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