Sorry, prob somewhere on the net, just can't find it. MBP 15" Getting the questionmark on restart. Have reinstalled OS X 10.5.8 twice. Tried disk util and sees the HD, 320GB Hitachi stock drive. Done a repair disk and permissions. Says Macintosh HD is OK and everything is in green several times. Reformated, repartitioned, tried to backup from Time Machine. Went from 297.8 GB free to 136.6 GB free after Time Machine b/u. I think it's sees the drive, just not booting. Tried the Option key to select startup drive, tried it from reinstall also. Have reset the PRAM several times. Anyone, please help me. Note: have seen things about limewire which i do not use.