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Version actuelle par : oldturkey03 (détails du vote) ,

Titre:

iMac Will Not Turn On

Texte:

I have a late 2012 iMac 21.5" that will not turn on.  Black screen, no gong, nothing...

I've disassembled the iMac and looked at the diagnostic LED's and found that only LED #1 (at least I believe it is #1) is the only one that turns on.  I then tested the power coming from the power supply which is giving me 11.79 volts on the following Pinout.

0  - ground

0 -  ground

0 -  ground

0 - 11.79 vdc

0 - 11.79 vdc

0 - 11.79 vdc

From what I read this is pointing to the logic board but I wanted to make sure from the Pro's out there in this forum.   Shouldn't I at least be getting 12 vdc and not under that?  I've watched it drop from 11.84 vdc to 11.79.  Please see the following pictures to understand what I described above.

[image|1008272]

[image|1008270]

[image|1008271]

[image|1008273]

Appareil:

iMac Intel 21.5" EMC 2544

Statut:

open

Réponse acceptée:

+411140

Contribution d'origine par : steharmon ,

Titre:

iMac Will Not Turn On

Texte:

I have a late 2012 iMac 21.5" that will not turn on.  Black screen, no gong, nothing...

I've disassembled the iMac and looked at the diagnostic LED's and found that only LED #1 (at least I believe it is #1) is the only one that turns on.  I then tested the power coming from the power supply which is giving me 11.79 volts on the following Pinout.

0  - ground

0 -  ground

0 -  ground

0 - 11.79 vdc

0 - 11.79 vdc

0 - 11.79 vdc

From what I read this is pointing to the logic board but I wanted to make sure from the Pro's out there in this forum.   Shouldn't I at least be getting 12 vdc and not under that?  I've watched it drop from 11.84 vdc to 11.79.  Please see the following pictures to understand what I described above.

[image|1008272]

[image|1008270]

[image|1008271]

[image|1008273]

Appareil:

iMac Intel 21.5" EMC 2544

Statut:

open