[QUOTE=vlad4242;2453295]because a computer with a broken hard drive should at least show the splash screen and start BIOS.[/QUOTE]
Actually no. This has been a very annoying “bug” of most BIOSes. If the Master Boot Record of the first installed harddisk is seriously messed up, there is a good chance you will not ever see a BIOS logo or something.
The “bug” is that the computer first reads the MBR, then processes the rest of the Power On Self Test (POST). Perhaps done because some BIOS tools reside on harddisks. I’m not sure.
Easy way to test this of course: Start up your computer without any harddisk at all and boot some linux live cd like Ubuntu.
If the laptop uses a SATA connection, you can purchase extension cords to connect a normal 3.5" sized harddisk to the harddisk connectors of the laptop.
If you can low level format your harddisk (all data seriously gone beyond normal recovery) you have a good chance you can see the BIOS logo again.