iMac G5 isight possible bad caps.

[RobotHamster]

Today I picked up a free G5 iMac (whoo free stuff) which had been lying around a friends shop for a while with what he thought was a dodgy psu which he couldn't be arsed paying for.
So I took it home and with some trial and error (mostly error) stripped it down to all parts since it needed a bloody good clean.
The psu looks terrible, but then again it could just be covered in glue, from the big yellow capacitors on the top.

So I ordered one but after poking around the motherboard some bulging caps caught my eye which didn't look to great.
So I googled it, as I've never done a stripdown this extensive or had to screw with capacitors, and didn't like what I found.

I was wanting a 2nd opinion before I get a soldering iron and new caps. Some pictures of all the mobo caps are attached. There are only two faulty as far as I can see. The first 8 pictures contain the faulty ones I can see.

[Pentium4]

Re: iMac G5 isight possible bad caps.

Yeah KZJ is a bad series from Chemi-con, I would replace all of them even if they aren't bulging. The rest are good caps and don't need to be replaced. Yay free stuff!

[RobotHamster]

Re: iMac G5 isight possible bad caps.

By my count there are:
4x1500uF 6.3V
4x1800uF 6.3V
3x120uf 16V
4x680uF 16V
1x1000uf 16V

Not counting the surface mounts. Only two of the 1500uF caps look bad.
the caps are rather cheap, but do I really need to replace all of them. Also I shouldn't really need to replace the surface mounted ones should I? None of them look remotely bad.

[RobotHamster]

Re: iMac G5 isight possible bad caps.

I had a look at the PSU which was the first thing thought to be a problem, as I have started thinking whether it was the caps on the logic board instead of anything to do with the PS. But it doesn't look great. I think the large yellow objects are capacitors but they might be inductors instead.