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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

Intel iMac (2006) power cuts out - PSU?


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Leggie

 
Member Since: Jan 26, 2011
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Hi guys and girls,

A friend's iMac has been playing up by randomly cutting out. I opened it up, with difficulty, because I wondered if the capacitors were shot; I can't seem to see any obvious damage, however.

Is this a known problem? I wondered if it was the PSU and have taken some photos, visible here.

The display also won't come on - I'm not sure if it was due to my fiddling with it or not - anything obvious I might check?

Thanks,

Leggie
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MacDude121

 
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It is possible that the power supply is gone. That would explain the random cut outs.
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chscag

 
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Unless my eyes are failing me, you've got coil leakage around the poly capacitors on the other side of the filter. It could be the way you took the photos but it appears something got hot at one time. That machine is going on 5 years old so it may not be worth putting a lot of money into.
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Leggie

 
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Thanks for the replies.

@chscag: Afraid I don't know enough to identify the poly capacitors - which are they, and might it be worth replacing those capacitors?
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chscag

 
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Take a look at photo number 4. The yellow transformer closest to the bottom of the photo (next to yellow coil with red stripes) looks like it overheated at one time and has leaked. Notice the black sticky like stuff on top and the sides.

The shiny poly capacitors (there are two) are close by. Replacing those capacitors or any other component on that board is probably not going to fix the problem. The entire PS should be replaced because damage may have been inflicted on other components. Like I said above, I wouldn't spend too much money on repairs for a machine that old. If you can get hold of another machine for parts (in other words, cheap) then it may be worth it. Check on eBay.
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Leggie

 
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Thanks for all the help. Probably won't be worth spending much time trying to save it, in light of what's been said.

Thanks again,

Leggie
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