So I am working on a PowerMac G5 for a client of mine. Initially reports were that the unit smelled like smoke/burning and that it would not turn on. I received the unit thinking that it was a power supply issue. I ordered the PSU and then started to disassemble it. Lo and behold I found an entirely new issue. This unit is liquid cooled. This means that it does not use a regular heat sink + fan. Instead it uses a water cooled device which is like a radiator inside of a car.
Now the problem with this is that overtime, it may spring leaks. I am guessing that it is truly a manufacturer’s defect. Not necessarily Apple’s fault but the fault of whoever’s heat sink design they used in the first place.
As you can see on the first three pictures, there is a lot of corrosion built up from the spilt liquid. This is not just a PSU case. It’s going to take a lot more. I found several websites with a lot of detailed information. This is definitely not an isolated occurrence.
Read to your heart’s content.