Hi, I have a MacBook Pro with OS X 10.6.8 For several months it crashes frequently, especially if I use several programs at once. The screen suddenly goes black but it does not shut down. If I am playing music, the same one second of sound will repeat over and over again. When this happens, the only solution is to hold down the power button until it shuts off, and then restart. Usually it makes a popping noise when it shuts down but not always. (Maybe the popping noise is normal? Idk) I finally decided to look into this problem as it is very bothersome and I have lost a lot of unsaved files because recently it happens more and more frequently. According to the disk utility, the startup disk is corrupt. I have tried to repair it in single user mode using applejack and fsck but I still get the same error message: I have the original installation CD but I can't use it because the superdrive is broken. After I insert the disc into the drive, it makes noises for a minute or two as if it's trying to read it, but then spits it back out. I tried several discs as a test but none of them work. I tried resetting the SMC and cleaning the drive but that didn't work, either. I am wondering, is it worth it to buy a cheap external superdrive and try to repair the disk or reinstall OS X myself, or should I give up and take it to the genius bar where they will probably charge me a boatload of money? Ideas?