diagnostic led blinks once when ac is connected
The Imac emc 2389 won't boot. There is no chime no beeps and just a black screen. I bought this computer used and non-working. I was told the power supply was bad. I swapped the power supply and ram from a working mid 2011 emc 2428, no difference.
I removed the glass and screen to access the diagnostic lights. Number one diagnostic led blinks once when I connect the ac cord then goes out. When I push the power button it blinks once more then goes out. No other leds light up. Any suggestions. I do have a multimeter and know how to use it. Thank you in advance