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Current version by: Shawn Kay ,

Title:

Not turning on. LED 1 light stays on after 'new' power supply & logic

Text:

I just hit a dead end.
Someone gave me a broken A1312 so I thought I could fix it.
At first, the diagnostic LED 1 stayed on. But it wouldn’t turn (No LED 2, 3, 4)on when I press power button. I took a step and try to check power button by wiring two pins together. Nothing. So it shouldn’t be the power button issue.
Next I changed power supply; bought used one from reputable seller. Same issue. LED 1 stayed on, but wouldn’t start after pressing power button. (No LED 2, 3, 4)
Next I changed the logic board; again, bought used one from online reputable seller. SAME THING! LED 1 stays on, but not turning on when pressing power button. (No LED 2, 3, 4)
-Is there another step of trouble shoot for LED 1 is on but not turning on?
+Is there another step of trouble shoot for LED 1 is on but not turning on? FIY, I always plugged into the wall directly. Even tried different 3-prong cables.
Please help. Now I’m in ~$150 with parts with this computer :(

Device:

iMac Intel 27" EMC 2429

Status:

open

Original post by: Shawn Kay ,

Title:

Not turning on. LED 1 light stays on after 'new' power supply & logic

Text:

I just hit a dead end.

Someone gave me a broken A1312 so I thought I could fix it.

At first, the diagnostic LED 1 stayed on. But it wouldn’t turn (No LED 2, 3, 4)on when I press power button. I took a step and try to check power button by wiring two pins together. Nothing. So it shouldn’t be the power button issue.

Next I changed power supply; bought used one from reputable seller. Same issue. LED 1 stayed on, but wouldn’t start after pressing power button. (No LED 2, 3, 4)

Next I changed the logic board; again, bought used one from online reputable seller. SAME THING! LED 1 stays on, but not turning on when pressing power button. (No LED 2, 3, 4)

Is there another step of trouble shoot for LED 1 is on but not turning on?

Please help. Now I’m in ~$150 with parts with this computer :(

Device:

iMac Intel 27" EMC 2429

Status:

open