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HT1767: iMac G5: How to Reset the SMU

Learn about iMac G5: How to Reset the SMU

HT1767 iMac (27", 2011, OSX) will not turn on.  Get start up chime and fan noise

426 Views 1 Reply Latest reply: May 31, 2013 8:56 AM by matt00 RSS
Mrs Orange St Calculating status...
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May 29, 2013 5:09 AM

Help!  have had no previous problems with iMac but today it suddenly either turned off or went into sleep mode during use and will not turn on again.  When I press the power button I get the starting sound and can hear the fan but the screen goes completely black and it appears to turn off again.  Any suggestions please?

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