Basically Monday I came home from school and i got a message that said "No boot device- insert book disc and press any key" so I hooked up my other computer and tried googlin' some stuff and I found this website that gives the restore cd to download, so I downloaded it and set up the BIOS setup so I can do it on my usb flash drive, so I put in my flash drive and that message went away and another message came up saying missing operating system.
Also Diagnostics on the HD failed

but i'm hoping that the HD doesn't have damage to it