Can't boot up my HP XE4100 laptop

when i switch on the following message comes on the bottom of the screen: Press ESC to change Boot order, F12 to boot from network, press <F2> to enter SETUP, <F10>to start DiagTools.
If I press ESC, bootv menu comes up with 4 options, 1. Hard disk, 2. Removable device, 3. CD Rom/DVD Drive, 4. built in Lan.

If I press F12. Screen states “booting from network.......P” but then reverts to e-diagtools main menu.

If I press F2 it asks for a password to enter setup. (I don't know password)

If I press F10 it obviously enters the e-diagtools main. If I perform a test on the system the test results state it has passed. No errors found