Recent Hardware Changes. Corrupt drivers for any recently installed hardware can crash the system. To get rid of the corrupted drivers, do the following:

a. Uninstall all recently added hardware.
b. Try to restore the system to a previous restore point
c. Reboot the system and return to a previous stable configuration if possible
d. Remove all external peripherals (printer, cameras, scanners, etc) and connections until the computer returns to normal. 5. Bad video/graphics card. At this point, if your computer is still under warranty, its time to call for help. If not, you can get a computer geek to come to your house (it is cheaper to take your computer to their store) or try to fix the problem yourself.

a. Is AGP/PCI video card compatible with your operating system? If you are experienced with opening up the chassis and resetting cards, reseat the video card, and try again.
b. Check the pins on the cable connectors and see that they are not bent or broken.
c. Never attempt to open the monitor. Turn on the monitor and try to reboot the computer again. If this doesn’t work, go to Step 6.

6. BIOS – the Binary Operating System may be corrupted – Use of Safe Mode to boot system.

a. Try starting the computer in the safe mode. Restart the computer and see the point to which it boots up before you get the blank screen.
b. Press F8 as the computer starts to boot. (For HP and Compaq computers with VISTA, use F10, For HP Pavilions with XP or earlier version of OS, use F1). Use the arrow keys to select the safe mode and press Enter. Remember that NUM LOCK should be OFF for the arrow keys to function.
c. If Windows launches before you can choose the safe mode, restart computer and go to step a.
d. You can choose “Safe mode with command prompt” option if you know how to use MS-DOS
e. You can choose “Last known good configuration” to go back to the last known safe shutdown state.
f. If you have added any drivers or corrupted any files the last time you used the computer, the safe mode will help you get back to the state before the changes, when the computer was running smoothly.

7. BIOS – the booting software may be corrupted – Use of Recovery Console to boot system

a. If the recovery console is already installed on the system, one of the options you see while the system is initially booting up will be “Microsoft Windows Recovery Console”. If it’s not already on the system, it can also be accessed through the network during “command prompt with network” option in safe mode.
b. Recovery console can also be installed at the time of need from the CD-ROM. Go to the following link for additional info : http://support.microsoft.com/kb/301645
c. Recovery console helps to Enable or disable services. If Windows informs us during boot up that a file is corrupted or missing, then we can use the Recovery console to copy files from a CD to the computer to repair the corrupted or missing information.
d. You can also recover the system by reconfiguring a service that may be preventing your computer from starting correctly. (FIXMBR, FIXBOOT, etc)
e. For a list of Recovery Console commands, search : http://www.microsoft.com/

Just click below for more information;

http://www.geekswhoknow.com/articles/reasons_you_get_a_blank_screen.htm

Hope this may help;

Regards,
VOTIT