iMac died after loud "pop" and will not turn on, why?

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iMac Intel 20" EMC 2105 and 2118

Model A1174 with 2 GHz Core Duo or Model A1207 with 2.16 or 2.33 GHz Core 2 Duo

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felipe @felipe78597

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发帖于: 2013年12月17日

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iMac died after loud "pop" and will not turn on, why?

Hi,

My iMac was in sleep mode, when i moved my wireless mouse to wake it... the computer made a loud "pop" and shut off... I tried turning it on, but nothing. I tried diffrent outlets and still nothing. Someone suggested i open it up and check the Capacitors... I did, but they look fine. The ones on the power supply look fine as well. It has no warranty anymore, it's why I decided to open it up. Now i don't know what to look for, Should I just get a new power supply?

Someone please help... I know it's an old computer, but I really don't want to trash it.

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after the "pop" did you smell something burnt?

由 _Z_ 完成的 2013年12月18日

No burnt smell... Even after i opened it up... I sniffed all over, but nothing. :( I'll check the capacitors again... maybe i could've missed something.

由 felipe 完成的 2013年12月18日

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originalmachead @originalmachead

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发帖于: 2013年12月18日

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Check the diagnostic LED lights if #1 is out it's your power supply.

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To be honest... I did not check for lights after i opened it up... All i am sure of is that the power button had no response whatsoever. Now it's all disassembled, so probably can't check for lights any... Or can I?

由 felipe 完成的 2013年12月18日

Yes - see this and this

由 originalmachead 完成的 2013年12月20日

Hmmm... I'll have to put it back together to check this. I'll do that and get back with the LED results.

由 felipe 完成的 2013年12月21日

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No burnt smell... Even after i opened it up... I sniffed all over, but nothing. :( I'll check the capacitors again... maybe i could've missed something. — felipe
To be honest... I did not check for lights after i opened it up... All i am sure of is that the power button had no response whatsoever. Now it's all disassembled, so probably can't check for lights any... Or can I? — felipe
Hmmm... I'll have to put it back together to check this. I'll do that and get back with the LED results. — felipe

Anthony @anthony73977 声誉积分: 1 · Answer 1 · 2015-06-13T00:56:42-07:00

Anthony @anthony73977

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发帖于: 2015年6月13日

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Same exact thing happened to my iMac. I have a 2012 iMac and it won't turn on after the loud pop. I have tested the cord and the power supply and all seem to be fine. There are no burning smell and I don't think the 2012 iMacs have the diagnostics LEDs. I am worrying that my logic board has failed.

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Have you fixed your iMac since then ?

由 Anthony 完成的 2015年6月13日

What did you end up finding out? I have a 2012 iMac, 21.5" and they DO have the diagnostic LED's. #1 is on for me. I am having the same problems as you.

由 steharmon 完成的 2017年1月20日

This happened to my Late 2012 iMac. Heard a pop and smelled a bit of electrical smoke. It tripped a circut breaker and wouldn't turn on afterwards.

Pulled the thing apart. No visible damage, but the none of the diagnostic LEDs would turn on when connected to power. Replaced the PSU and it was good as new.

由 Daniel 完成的 2021年9月2日

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iMac Intel 20" EMC 2105 and 2118

iMac died after loud "pop" and will not turn on, why?

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