Please try to attach an external monitor & see if you can get any display on it. If you can get display on an external monitor, then the root cause of the problems you have might be either a failing LCD backlight or a failing inverter board.
Please refer to the following article for more details on how to diagnose & troubleshoot LCD backlight & inverter board issues:
http://www.fixya.com/support/r6430776-troubleshooting_laptop_power_failures
Click the "Start" icon in the lower-left corner of the screen and click "All Programs." Click "VAIO Care" then click "VAIO Care" again. The VAIO Care program will open.
Click "Recovery & restore" on the left side of the VAIO Care window, then click "Recovery." Click "Recovery Computer" on the right side of the program window.
Click "Yes" to verify that you are aware the computer will be recovered to its original factory settings and that all of your personal files and programs will be erased.
The computer will restart and the recovery process will begin.
When the process is finished, the computer will restart again and boot up to the Windows 7 setup screen.
Recover Using Recovery Partition
Turn on or restart your Sony Vaio computer.
Press the "F10" key repeatedly when the Vaio logo appears on the screen during the boot process to be redirected to the Boot Options menu on your machine.
If the Boot Options menu does not appear by the time the Windows logo appears on your screen, let the computer finish booting up, then restart the computer and try again.
Highlight "VAIO Recovery Environment" in your Boot Options menu and press "Enter."
The VAIO Care program will appear on your screen.
Follow steps 2 and 3 in Section 1 to recover your Sony Vaio computer with Windows 7 to its original factory settings.
Recovery Using Recovery Discs
Insert the first recovery disc in your optical drive and restart your Sony Vaio computer.
The total number of recovery discs varies based on your Sony Vaio computer.
The Boot Options menu will appear on your screen. Highlight "Start Sony VAIO Care Rescue" using the arrow keys on the keyboard and press "Enter." The "VAIO Care Rescue" program will appear on the screen.
Click "Tools," then click "Start advanced recovery wizard." In the "Do you need to rescue your data?" window, click "Skip rescue."
Click "Factory condition," then click "Next." Click "Yes, I'm sure" when asked if you want to proceed with the recovery knowing that all of your personal files and programs will be erased.
Click "Start Recovery." Remove and insert the recovery discs as prompted by the computer.
Remove the final recovery disc and click "Restart" when a message appears on the screen informing you that the recovery is complete.
The computer will boot up to the Windows 7 setup screen where you can begin personalizing your operating system
or
Sony Vaio usually installs their system files right on the computer.
If you click on "Start" then "Vaio Central" a window should open up.
Click on the "Support" tab, then "Recovery".
hope this helps
which operating system ?
Click the "Start" icon in the lower-left corner of the screen and click "All Programs." Click "VAIO Care" then click "VAIO Care" again. The VAIO Care program will open.
Click "Recovery & restore" on the left side of the VAIO Care window, then click "Recovery." Click "Recovery Computer" on the right side of the program window.
Click "Yes" to verify that you are aware the computer will be recovered to its original factory settings and that all of your personal files and programs will be erased.
The computer will restart and the recovery process will begin.
When the process is finished, the computer will restart again and boot up to the Windows 7 setup screen.
Recover Using Recovery Partition
Turn on or restart your Sony Vaio computer.
Press the "F10" key repeatedly when the Vaio logo appears on the screen during the boot process to be redirected to the Boot Options menu on your machine.
If the Boot Options menu does not appear by the time the Windows logo appears on your screen, let the computer finish booting up, then restart the computer and try again.
Highlight "VAIO Recovery Environment" in your Boot Options menu and press "Enter."
The VAIO Care program will appear on your screen.
Follow steps 2 and 3 in Section 1 to recover your Sony Vaio computer with Windows 7 to its original factory settings.
Recovery Using Recovery Discs
Insert the first recovery disc in your optical drive and restart your Sony Vaio computer.
The total number of recovery discs varies based on your Sony Vaio computer.
The Boot Options menu will appear on your screen. Highlight "Start Sony VAIO Care Rescue" using the arrow keys on the keyboard and press "Enter." The "VAIO Care Rescue" program will appear on the screen.
Click "Tools," then click "Start advanced recovery wizard." In the "Do you need to rescue your data?" window, click "Skip rescue."
Click "Factory condition," then click "Next." Click "Yes, I'm sure" when asked if you want to proceed with the recovery knowing that all of your personal files and programs will be erased.
Click "Start Recovery." Remove and insert the recovery discs as prompted by the computer.
Remove the final recovery disc and click "Restart" when a message appears on the screen informing you that the recovery is complete.
The computer will boot up to the Windows 7 setup screen where you can begin personalizing your operating system
hope this helps
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