Insatalled a WD5000 hd in intel 21" imac 2006 worked fine for a couple of months then tried to switch on and got the Apple logo and spinning wheel. Tried to reset PRAM, starting from DVD and in Target mode - nothing. Will not respond to keyboard. Replaced old drive - no problems. Whats happened?
iMac, Mac OS X (10.6.8)
iMac, Mac OS X (10.6.8)