Il Mio Problema
Our 17" IMAC G5 (2005) had been dying a slow death. First the sleep function failed, then it periodically wouldn't start. The question - was it time for a new MAC?
La Mia Riparazione
After diagnosing (correctly, yeah!) that the problem was the power supply, we decided that it was worth repairing the IMAC and keeping it another two years. I ordered the parts from ifixit, they came the next day, I followed their instructions and it all worked! The IMAC works beautufully. While I was inside, I doubled the RAM to 1GB. Since RAM is cheap now, that seemed a good investment.
Il Mio Consiglio
I was so happy with the repair, I went out and bought more RAM for my Windows laptop. Wish I had ifixit instructions for the PC!