How to troubleshoot an iMac 27 late 2012 that wont power up?
So I decided to upgrade my iMac with a blade ssd. I followed ifixit guide carefully. Everything went fine, there were no trouble at all, so I decided to put a new thermal paste in the cpu while i'm at it. The reassembly of the cpu didn't go as smooth, but I did managed to assembled it. But as I reassembled the machine, the iMac wont boot up. There is no sound coming from the iMac. The LED #1 on the logic board is lit, but nothing on the others when I push the power button.
My initial thought is that I have toasted the cpu, as it was the only step I had trouble with. Worst case scenario is that I have toasted the logic board. Is there anyway to check which unit is the cause of the power up failure? Can I assume that the power supply is fine when there is light on the LED #1?
Symptoms before the ssd upgrade: The iMac had trouble waking up from sleep. It went on "hibernating" mode and it took a while to start up again. I tried pram and smc reset andd it didn't help. Which is one of my reason to upgrade to ssd.