Can anyone help? My G5 power mac with the quad processor broke down the other day. Took it to a mac approved shop called farpoint, and at the moment they are saying it is the power supple gone. Problem is i think they could be ripping me off apparently for a new part it will cost £100/$200 and they say it is tricky to put in and can take over an hour. Charging me £70/$140 per hour! I have a friend who builds computers and he seems to think that is too expensive and he could do it in 30 minutes. What would you do pay a lot of money or get someone else to do it? john oh also does have a g5 so they can see what the product number is for a new power supple i want to check how much they are to buy?