Powers on then shuts off
I have iMac early 2006 20 inch computer.
I've upgraded cpu Intel Core Duo 2.0 ghz -> Intel Core 2 Duo T5600 1.83ghz.
Now computer powers on (power led goes on) but few seconds later iMac shutdowns. (No startup chime etc.)
What is problem?
I've tested with original cpu but same problem.