Hi
New Member?
I suggest that it may be a failed Hard Drive.
http://h10032.www1.hp.com/ctg/Manual/c01859455 / http://h10032.www1.hp.com/ctg/Manual/c02791831
may help out a little.
System Recovery options
You should attempt a System Recovery in the following order:
1.Through the hard disk drive, from the Windows 7 Start menu.
2.Through the hard disk drive, by pressing F11 on the keyboard during system startup.
3.Through recovery media that you create.
4.Through recovery discs purchased from HP Support.
To purchase recovery discs,visit http://www.hp.com/support
Is F2 diagnostics?