iMac doesn't start, but led 1 is on, what's the problem?
Alright, first , it started with vertical lines on the entire screen, making the mac impossible to use (but it was still starting, booting, hearing the sound ....), witch let me think to a graphic card issue.
So i took everything appart, helped by this great website, build it up again with all the same pieces), and then the mac just didn't start at all (no fans, no sound).
So i took off the screen again, and saw that the led 1 was lighting. But, if i press the on/off button, the led 1 just immediatly turn off and nothing happen. If i plug off the AC cord and plug it again, then the led 1 lights again, but still can't go further.
Time for voltmeter now. The pin 4 of the MB is showing 14.5 V (shouldn't it be 12 V ? Here in france we are using 220v AC...), nothing on the pin 11, and 4,5 on the pin 12. If i press the on/off button, led 1 turns off, but pin 4 is still showing 14.5, 0 on pin 11 and still 4.5 on pin 12.
Doc , i need your help !
i wish to believe that the MB is still alright and that the problem comes from the graphic card... Any helps anyone ?
Thanks in advance
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