Question about Dell Inspiron XPS M140 Notebook

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The screen resolution on my Dell XPS M140 changes dramatically when on battery power. It's like everything becomes overly whitewashed and bright (so much so I can't use my laptop unless it's plugged in). I've changed powere settings, but this doesn't seem to help. Any experience with this?

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Unfortunately, this is not a fix that you can actually do yourself. The actual battery circuit is not functioning correctly.

The transformer is supposed to regulate the amount of power running to the components, it is working, but only on AC.

It does need to be taken in for repair.


Posted on Sep 13, 2009

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The inverter handles how bright the display is because it takes the DC power from the adapter and converts it to high voltage AC power for the backlight. When the inverter starts to and finally fails, the screen goes dark. Your problem is most likely an inverter failure.

Jan 04, 2010 | Dell Inspiron XPS M140 Notebook

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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


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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Right click on the screen, and select properties. The screen properties will come up, select settings tab, and there you adjust the resolution

Oct 22, 2009 | Dell Inspiron XPS M140 Notebook

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Make sure any programs that consist of sound for example " Soundman" is running this can cause a conflict with your audio. Check for updates if you can

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You backlight is failing. That is the bulb that provides the brightness to the screen. You need to replace bulb which is very tricky to do unlesss you have experience or replace the screen.

Please rate this if helpful.

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1 Answer

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Notebooks usually don't have high res . They trade off the high resulation  for the small size and less power consumption.

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Most laptops that I have worked on that power off that quickly turned out to be an overheating problem. Is the cooling fan running for the brief period that you can hear the hard drive before it powers off ? If the fan is running another potential resolution might be to remove the processor and apply new thermal paste.

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