As noted in a previous thread, I have a dying Power Mac G5 (dual 2 GHz). I'm wondering about the wisdom of trying to replace the power supply myself, if indeed that is the cause of my problems. The computer has been crashing a dozen times daily and cannot be rebooted unless you open the case & push the PMU reset button.... so I'm making an uneducated guess that it's the power supply that either needs cleaning or is getting ready to fail. I see at this site (DT&T Service) they're selling replacement power supplies for $145.... and I found detailed instructions on how to disassemble the G5 here. So, I could: A) take the G5 to Apple and have them fix it for $1700 minimum B) buy a new mac pro for $4800 or C) roll the dice and spend $145 to see if I can fix it myself with the help of a friend who's handy with Apple hardware. Worst-case scenario: I annihilate the G5, which feels like its on its way to dying anyway. Best-case: I can keep working without spending the money I don't have right now. What would you do?