Coloured squares appear on screen

Files missing or corrupt.
I would re load windows.

Try here: http://www.amazon.com/Sony-Vaio-VGP-BPS9-Laptop-Battery/dp/B008AN1TVI

Try Settings / Update & Security / Reset Laptop

a model number needed for even a guess here

Hook a spare monitor to the video output usually on the back, if picture okay! the LCD screen will need to be replaced on the laptop, but if both show the same symptom it is the Video Graphics Card normally built into the motherboard.

Have a very close look at the blue and see if it's perfectly uniform across the whole screen.
If it is then altering the hue or colour temperature settings in the menu may help.
If it's not then either there are heaps of pixel failures (appearing as small rectangular spots) or degradation of the polarisers (green may be affected more than the others).
If you show the menu, do the white areas appear bluish.
If the lamp is very old then colour changes start to happen.

Hi,
Please follow these steps,there are different way od going to BIOS depending on the brand of the laptop.

1
Turn on your computer

2
Hold down F2, this will take you into BIOS. On some computers it might be the DEL key, or F1.

3
Change the settings in BIOS to what you desire. You will see parameters for various devices, if your BIOS allows it, you can even overclock the CPU.

4
Look at the BIOS menu. You will be able to see the make, model, and capacity of your hard drive, processor speed, time and date, among many other settings.

5
Click "exit without saving changes" if you make a mistake, and nothing will be changed.

Hope this will help...Your response is very much appreciated...

Check the settings in the menu and make sure you have the input properly set to RGB and not color difference settings (Y, RY, BY).

my laptop sony vaio vgn-n130g it is do not work LCD back light in press (Fn and F5- F6+)