4 Replies Latest reply: Oct 8, 2012 10:38 AM by mende1
Kristie G Level 1 (0 points)

I have a mac pro that when i turn it on i get a black screen and the "sleep light" is on but i also get a beeping sound. How do i fix this? I have powered off turned it back on and tried the command, option, P, and R and still nothing

MacBook Pro, OS X Mountain Lion (10.8)