Laptop Screen blackout

Asus W3A
November 30, 2007 at 20:15:42
Specs: Windows XP Pro, Intel Pentium M, 512MB
Hi guys,

I don't know if any of you had this problem before but my W3A's screen would black out completely on random occasions! The laptop would still be running, as in I can do everything as if nothing happened, except I can't see anything cos the screen is black. It didn't matter what I was doing at the time, watching movies, playing games, surfing the net or even just leaving it idle, it could happen at any time. The only way I could fix it was to shut it down and restart again, although it would happen again, sooner or later. One period it happened so frequently I went to get it checked out. The technician said that it was a faulty hard drive, so he got it changed for me. At first I thought the problem was fixed, until it happened again! Though it was not as frequent, it would still black out a number of times so I went back and told the technician what was going on. He left my laptop on for a few days and said that the screen did black out, but he didn't know what was wrong. He thought there were something wrong with my settings, so he set my bios and windows settings back to default and gave it back to me. Guess what? It still happened, but not as frequent. Only a few days ago my laptop blacked out again, but this time, the screen was completely green! What is wrong with my laptop??? Someone please help me ='(

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December 1, 2007 at 06:52:55
replace the inverter board, it controls the screen

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December 1, 2007 at 08:51:32
If you have a VGA port on this you can plug in a monitor to, try connecting a monitor to it. If you have no problems with that monitor, or in any case, your backlight is probably dying, and/or the voltage inverter that supplies high voltage to the backlight is faulty.

For some info about replacing a voltage inverter or backlight, and what some typical symptoms are, see response 5 in this:

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December 1, 2007 at 16:05:23
Doesn't the inverter board control only the light going on and off? If the inverter board stopped working, won't I still be able to see my desktop just that it would be very dark?

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December 1, 2007 at 16:23:25
I would also like to ask if the inverter board and the voltage inverter are the same thing? Thanks guys!

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December 1, 2007 at 20:12:01
Did you read the stuff at the link I pointed you to?

The voltage inverter circuit is what converts DC voltage to high AC voltage the backlight requires. The components may be on a board, or may be inside a single module, or similar.
If the voltage inverter circuit doesn't work at all you get no light from the backlight.
If there is something wrong with the backlight, a normal voltage inverter circuit will "shut down" but you may still see an extremely dim display.
If there is something wrong with the voltage inverter circuit, you can have all sorts of symptoms.

If a monitor works fine plugged into a VGA port on the laptop, the only other things that can cause alternate blackness/normal display is:
- the wiring is damaged between the base and the display, often where it passes through the hinge. This can only happen after the laptop has been opened and closed a lot, and it may happen intermittantly, depending on the position the lid is in, before the display goes black all the time. It's relatively inexpensive to replace the wiring.
But it's likely you would either get a display or no display - that doesn't account for the tint you are getting, which is a common symptom of a failing backlight.
- the laptop was dropped and circuits in the display unit in the lid were damaged - you don't have any of the common symptoms of that - lines of one color, or blank (black) lines, large patches of dead pixels, random artifacts (inappropriately colored pixelsior small patches of pixels,etc.

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