Are there any upgraded power supplies you can purchase for a G4 Quicksilver? This is the non-airtunnel version. I noticed mine was making noises, was having trouble with extra peripherals (hard drives, extra ram, etc.) so I removed everything extra, it was performing fine, now is acting up again. It periodically makes a clicking noise if it's been on for a while. I have replaced the hard drive, memory, heatsink module, fan, CD-ROM, graphics card, and still it does this and seems to be getting worse now. I have narrowed the problem down to either the Power Supply or the Motherboard, since the problem seemed a lot worse with an extra hard drive in the unit. Looking at the specs for the power supply, it isn't rated at a very high Wattage, so I'm looking if possible to get either a brand new one or one with higher wattage if that's feasible. I looked on ebay for one, but people are selling for $110 or more (which is ridiculous when the whole computer is worth maybe $400). Any suggestions? I am normally a PC guy so am used to just swapping out parts if they go bad, but am having no luck with this (I have built and maintained over 10 different computers over the years and this mac is the only one I have had trouble with for longer than a week or two since I can't swap out the parts easily). PS ordered a 24" iMac, but waiting on it to come in still, I would still like to keep the old unit however as a secondary system.