Having problems with your Dell Inspiron XPS M140 Notebook ?

I have a problem with my M140 Dell XPS LCD display. I have a white patch from top to bottom not complete screen but a portion of it. Do I have to replace LCD or inverter


Answers :

This is most likely cased by your LCD screen being defective.

The inverter will either light the back light or not, it does not have the ability not to filter certain parts of the screen. It could however be that if your seeing wash out and it goes from super bright white to a dimmer bright white the inverter has failed and the bulb is running at full power.

Most likely it is your LCD.

To test your inverter, turn your computer off.

Press and HOLD the FN key while pressing the POWER key.

Once you see booting dell diagnostics, or something similar you can release the FN key. You might have to release the POWER key sooner if the under shuts down.
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