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Mac mini 2007 dead

Hi everyone,

I recently bought a dead Mac Mini from 2007. But when I try to power it on, there is nothing, no light, no chime, not any sound from it. I took apart the logic board and everything seems fine. The charger is working because on the second one i have, it works perfectly.

Do you have any suggestions to measure with multimeter ? Because I’m used to laptops not Mac Mini’s. Thanks :)

Update (03/24/2022)

On the global photo, it’s at the top right

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Can you take a second picture so we can at least read the logic board labels and the cap if its still intact in the location it was located.

@danj hello, i removed the capacitor the motherboard is a 820-1900-A from 2006.

It has the same size as the others next to it @danj

@anthony10006 - Just because it looks the same doesn't mean its the same values.

Yes i know. Unfortunately, i can’t find any schematic for this board :( @danj

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선택된 해법

Le problème venait d’un condensateur en court-circuit. Maintenant le mac remarche mais il me reste à remplacer le défaillant.

The problem was a shorted capacitor. Now the mac works again but I still have to replace the faulty one.

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Have you tried just replacing the PRAM battery?

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You may need to take the logic board fully out so you can inspect the other side. Look for a component that looks discolored or burnt. Often the electrolytic & tantalum caps breakdown. Mac mini Model A1176 Logic Board Replacement

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@danj Hi, thanks for your fast answer. Is it possible that the mac could not turns on due to an issue with the pram battery ? Also, as i saw, i didn’t manage to find some dead caps on the logic board, the only thing that i noticed it that a ceramic cap looks weird near the cpu, it is a bit brown not as usual. So i used my multimeter to test for continuity and i have a value of more than 1100 on the line and this seems weird. Thanks

@anthony10006 - The older systems need the battery to work properly. I would start there.

@danj hello, i found a dead capacitor and now the Mac works. But i can’t find a schematic for this model. Have you got one please ? It’s 820-1900-A for the board model. Thanks

@anthony10006 - Sadly I haven't found any for the Mini's. Best to ID the cap's specs how about posting both images of the cap and the location on the logic board. 기존 질문에 이미지 추가하기

@danj ok, i will send the image in the answers

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