Won't power up and only 1 diagnostic LED
My iMac just shut down, and won't power up. I'm guessing either power supply or main board (already reset pram and other troubleshooting steps).
For the diagnostic LEDs, only the first lights up no matter what order I try.
According to the manual 0 LEDs is the power supply, and 1 and 2 is working, but it doesn't say anything about just 1.
Before I spend $200 on a power supply, are there any other ideas?