Ive already opened it up. I have experience with repairing electronics, etc. But now i'm stuck;
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I've already opened it up. I have experience with repairing electronics, etc. But now i'm stuck. On the logic board ( Main board) :
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* Diagnostic LED 1 goes ON, this seems a power-OK led to me, I measure 12v on the supply.
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* If I press the power button nothing happens.
+
* I detached all peripherals, sdcardreader, camera, audio, hdd, speakers, etc. Still nothing.
+
* I checked the power button, the button and cables are OK.
+
* I can also measure 12v on the logic board.
-
On the logic board ( Main board) :
-
-
Diagnostic LED 1 goes ON, this seems a power-OK led to me, I measure 12v on the supply.
-
-
If I press the power button nothing happens.
-
-
I detached all peripherals, sdcardreader, camera, audio, hdd, speakers, etc. Still nothing.
-
-
I checked the power button, the button and cables are OK.
-
-
I can also measure 12v on the logic board.
-
-
Question:
-
-
What can keep it from powering on, what does it need?
-
-
Does it need memory in the banks to power on, ( LED #2) ?
-
-
Could it be a faulty CPU or GPU, does it need that to power on?
-
-
Do all the sensors have to be connected?
-
-
Could I detach the video card an test power without it?
+
Questions:
+
* What can keep it from powering on, what does it need?
+
* Does it need memory in the banks to power on, ( LED #2) ?
+
* Could it be a faulty CPU or GPU, does it need that to power on?
+
* Do all the sensors have to be connected?
+
* Could I detach the video card an test power without it?
The thing is I don't feel like replacing the logic board, its to expensive, I just wondered if there is any information about the "logic" which turns on the power, could I override it, so I can see where the smoke comes from ? :)..
Hi,
I have a Power issue with my imac mid 2011.
Ive already opened it up. I have experience with repairing electronics, etc. But now i'm stuck;
On the logic board ( Main board) :
Diagnostic LED 1 goes ON, this seems a power-OK led to me, I measure 12v on the supply.
If I press the power button nothing happens.
I detached all peripherals, sdcardreader, camera, audio, hdd, speakers, etc. Still nothing.
I checked the power button, the button and cables are OK.
I can also measure 12v on the logic board.
Question:
What can keep it from powering on, what does it need?
Does it need memory in the banks to power on, ( LED #2) ?
Could it be a faulty CPU or GPU, does it need that to power on?
Do all the sensors have to be connected?
Could I detach the video card an test power without it?
The thing is I don't feel like replacing the logic board, its to expensive, I just wondered if there is any information about the "logic" which turns on the power, could I override it, so I can see where the smoke comes from ? :)..
TNX!!
Regards,
Guido
Hi,
I have a Power issue with my imac mid 2011.
Ive already opened it up. I have experience with repairing electronics, etc. But now i'm stuck;
On the logic board ( Main board) :
Diagnostic LED 1 goes ON, this seems a power-OK led to me, I measure 12v on the supply.
If I press the power button nothing happens.
I detached all peripherals, sdcardreader, camera, audio, hdd, speakers, etc. Still nothing.
I checked the power button, the button and cables are OK.
I can also measure 12v on the logic board.
Question:
What can keep it from powering on, what does it need?
Does it need memory in the banks to power on, ( LED #2) ?
Could it be a faulty CPU or GPU, does it need that to power on?
Do all the sensors have to be connected?
Could I detach the video card an test power without it?
The thing is I don't feel like replacing the logic board, its to expensive, I just wondered if there is any information about the "logic" which turns on the power, could I override it, so I can see where the smoke comes from ? :)..
TNX!!
Regards,
Guido
Hi,
I have a Power issue with my imac mid 2011.
Ive already opened it up. I have experience with repairing electronics, etc. But now i'm stuck;
On the logic board ( Main board) :
Diagnostic LED 1 goes ON, this seems a power-OK led to me, I measure 12v on the supply.
If I press the power button nothing happens.
I detached all peripherals, sdcardreader, camera, audio, hdd, speakers, etc. Still nothing.
I checked the power button, the button and cables are OK.
I can also measure 12v on the logic board.
Question:
What can keep it from powering on, what does it need?
Does it need memory in the banks to power on, ( LED #2) ?
Could it be a faulty CPU or GPU, does it need that to power on?
Do all the sensors have to be connected?
Could I detach the video card an test power without it?
The thing is I don't feel like replacing the logic board, its to expensive, I just wondered if there is any information about the "logic" which turns on the power, could I override it, so I can see where the smoke comes from ? :)..
TNX!!
Regards,
Guido