Imac switches itself On even though it's been shut down!

Hi,
My imac switches itself on even though it has been shut down properly (i:e not sleeping)!
Any reasons why or ideas please?
iMac 2 Ghz Intel Core Duo Mac OS X (10.4.6) 20" screen
iMac 2 Ghz Intel Core Duo Mac OS X (10.4.6) 20" screen

Hi Spenny,
Do you have any Apps that are not working properly or Apps that appear open from the Dock and shows the menu bar but no App window?
Have you looked here (System Profiler): Go to Apple Menu > About this Mac > More Info > Contents > Hardware > Diagnostics... you can see what kind of Power up info is contained...
If it were me, I would go ahead and try resetting the SMC and pay careful attention to the instructions. If this does not help, I believe your machine is not actually turning off. So, if were me, I would force a shut down by holding the POWER BUTTON till machine turns off, this may take a few seconds but it will shut down and then go through resetting the SMC again....
Let us know, good luck, Rick
iMac G5 iSight 20" - 30G iPOD in Slimming Black - Mac OS X (10.4.7) - HP Pav 15" WS and Toshiba Sat 17" WS LP's - Canon 20D & A620

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