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My laptop screen went black every thing is working but i cant see anything what might be the problem

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  • pcustad Oct 14, 2010

    What is your model and brand of laptop?

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  • Computers & ... Master
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Heidib92 your Inverter is bad, or the Backlight. (Freeze Mode? lol)

An LCD screen cannot produce enough light by itself. It needs an external light source.
The Backlight.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp

There are examples of these in residential, and commercial applications.
The Fluorescent lamps you see on the ceiling. (Schools, businesses, banks, etc)

A Backlight is located generally on the edge of the LCD screen.
(An LCD screen is a composite of layers. The outside layer that faces you is a protective screen)

An Inverter is used to change the electrical source leading to the LCD screen, and Backlight, from the laptop.

A laptop cannot produce enough electrical power to power an LCD screen. It also provides power to the Backlight.

Here are examples of replacing a Backlight in a laptop, and an Inverter,

1) Backlight:

http://www.insidemylaptop.com/category/backlight/

2) Inverter:

http://www.insidemylaptop.com/category/screen-inverter/

What is the manufacturer name , and Model Number of your laptop? It's on the Bottom of the laptop. This way I might be able to provide more than just the generic info above.

Post in a Comment.

Regards,
Expert Moderator - joecoolvette

Posted on Oct 14, 2010

  • joecoolvette
    joecoolvette Oct 14, 2010

    Edit:
    "A laptop cannot produce enough electrical power to power an LCD screen. It also provides power to the Backlight."

    An Inverter is used to produce enough power to power an LCD screen. It also provides power to the Backlight.

  • joecoolvette
    joecoolvette Oct 22, 2010

    Should add: 90 percent of the time the problem is the Inverter. My money's on the Inverter.

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  • Master
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Hold the unit slihtly to a light if you can see the icons dimly on the screen then your screen has gone into freeze mode if you cant see the icons then your screen is probly blown to reset the screen from frozen it needs to be un plugged from the motherboard and plugged back in the plug is located under the panal above the keys

best luck

Posted on Oct 14, 2010

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