No Power after CPU upgrade
I've updated old iMac cpu from Core Duo to Core 2 Duo.
Now iMac won't power on (power light waking for 5 seconds after it power goes off)
iMac doesn't power even if I tried with original cpu.
Model is iMac Early 2006 20 inch A1174.
Should logic board power on without case (like on desktop)?
Power supply looks OK (I've tried also ATX psu but same problem)
Battery changing tried also.
Some problem on logic board?