Fix Your Stuff Community Store

Model A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac12,2

708 Questions View all

Options

Why does the diagnostic LED1 turn on after hours?

I've been troubleshooting an old iMac 2011 27". After removing the screen I could use the diagnostic LEDS to gain some info.

When LED1 is on, the machine can be booted without problems. After disconnecting/reconnecting power this LED stays off. It can take hours till LED1 turns back on. After that it boots without a problem.

Am i correct to suspect a bad PSU for this behaviour? I just want to make sure before ordering a piece worth more than the Mac :)

Answer this question I have this problem too

Is this a good question?

Yes No
Score 0
Add a comment

1 Answer

Filter by:
Most Helpful Newest Oldest

Options

I would double check the AC power, a bad ground can send you down the wrong path. Get a simple outlet checker and also check the cord by trying a second cord and check the system socket.

Was this answer helpful?

Yes No
Score 0
Add a comment

Add your answer

DieterL will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 0

All Time: 14