Black screen after logo at startup

I have a HP laptop (G72-B66US) running on 64-bit Windows 7 Home Premium. Since I bought a year ago, it had been working fine, until one day he could not boot to Windows, leaving only a cursor flashing in the upper right of a screen LCD otherwise empty.

By pressing ESC before the end of the HP logo screen, I am able to access a Boot Menu:

F1 system information
F2 System Diagnostics
F9 boot device Options
F10 BIOS Setup
F11 recovery system

ENTER - continue starting

Various tests (HARD drive, memory, etc.) provided in the diagnostic system (F2) all completed successfully.

Also, I have started from a repair disc and ran Windows tool Startup Repair Tool, that is no problem.

I even restored a system image I created just after the purchase of the laptop, but the problem persists.

A hard reset after the removal of the battery did not help.

There are two things that I was not able to do, however:

1. I connected to an external monitor to the laptop, but the screen does not switch to the external display, even after I pressed F4 repeatedly. Same result with fn + F4.

2. press F8 at any stage of the commissioning is a not get into Mode Windows safe. Same result with fn + F8.

I wonder if the two functions are disabled somehow by the HP Boot Menu, otherwise why they don't appear as options in the menu?

In any case, any suggestions on how to proceed from here?

Hello

Boot from the rescue/repair CD you have, select repair your computer and choose the command line.  When this charge, enter the following commands and press on enter after everyone – including spaces as shown.

Bootrec.exe

bcdedit/export C:\BCD_Backup

c:

Boot CD

BCD attrib s h - r

Ren c:\boot\bcd BCD.old

Bootrec /RebuildBcd

Bootrec /fixmbr

Bootrec /fixboot

Remove the rescue CD and try to restart now.

Kind regards

DP - K

Tags: Notebooks

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