how to open an imac

i have a imac from 1999 (grape) and i think the power supply is bad. well i cant for the life of me figure out how to open it up. does anyone know of a good website w/ instuctions on how to? also what kind of power supply do i need to buy for it? thx alot.

Go to www.macworld.com/2001/10/howto/imac.html

And check eBay for power supplies... usually you just buy the whole board, for $30 to $40. You'll get a used board from an iMac that died, one hopes, from causes other than the power supply.