My macbook pro beeps three times immediately over a blank screen at boot. I've tried: option, command, P, R several times.
What could it be?
MacBook Pro (15-inch Early 2008), OS X Mountain Lion (10.8.2)
Posted on Nov 26, 2012 12:33 PM
Q: macbook pro 3 beep at boot
Usually means bad RAM.
Intel-based Mac Power On Self Test RAM error beeps
Power On Self-Test Beep Definition - Part 2
