havent replaced the hard drive or done anything other than hook up some USB stuff. and the beep doesnt happen at startup, just when its sleeping. heres my setup if itll help..<br><br>600mhz graphite imac<br>512mb RAM<br>apple pro mouse & keyboard<br>somesortof USB hub with a samsung ML4600 printer and a epson stylusscan 2500 printer and the cord for my kodak digital camera plugged in<br><br>