Answer to: Computer stuck at blue screen that asks for bios passwEasiest way to get passed it is by pulling out the CMOS battery for like 15-3O mins and then put it back in. It will reset the BIOS settings.
Answer to: Can't enter disk mode, diagnostics mode can't detect hard driveHave you assigned a drive letter to it or does it have a drive path? It won't be recognized if not.
Answer to: Restore contacts with a broken screenA couple things you can explore. Your Google acct. may have them backed up? There are some software programs that can restore deleted files and such. If it's really that important, you can always get the screen repaired!!