Hey guys! I have a iBook 12" with 640 Mb Ram and a CD/DVD combo drive. I started having problems with the computer booting. I called apple and they said to use the boot up cd and repair the drive. This worked for a while until one time i went to turn it on and the HD completely failed. I went and bought a new 20Gb HD for the iBook. I followed the instructions found on ifixit.com and replaced the Hard Drive. Only when i turn on the computer... i would hear the cdrom spin up and the hard drive spin and the fan kick-on but the screen won't turn on. So i put my old one in and it works fine. I need my computer working as soon as possible. It is difficult to do school with out a working laptop. Any help would be MUCH appreciated. Thanks!