MacBook Pro will not boot from hard drive, external drive, or OS X DVD
When I got the computer back I wiped the entire hard drive, did a fresh install of OS X from my original disc, then downloaded all software updates. It seemed to work for a couple of days, but then the hard drive started stalling and the computer started freezing, requiring a hard reboot.
Now, the computer will not boot at all. It will not boot from an external drive, and it will not boot from the Mac OS X DVD. If I hold "alt" at startup I get the option to select the OS X DVD, but once I select it the computer just sits on the Apple icon and never does anything. I ran the extended Apple Hardware Test and it found no issues.
This is extremely frustrating and it would be very inconvenient for me to lose my computer for another week. Does anyone have any ideas for me?
MacBook Pro 15" 2.53 (Mid-2009), Mac OS X (10.6.6)