Logic board or Psu?
I have a mid 2007 intel iMac 20" that won't power on. When I plug the ac adapter in the first led comes on. When I press the power button led's 2 and 3 come on and the fan spins at regular speed and the optical drive starts up. Led 4 never comes on so I think its an LCD or video card problem. Do I need to test the Psu or is it the logic board or the video card? Thanks in advance!
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