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LCD display back light dose not work the screen dose function properly but no light

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  • George46 Mar 11, 2008

    Very faint image on screen. With incandescent lamp can see video display as you move lamp around screen. An external monitor displays proper video display.


  • fredx2 Nov 23, 2008

    my lcd monitor is black. I can see faintly the display but cannot make out the details because there is not backlighting. My local computer man tells me the video card is not working and the video is integrated in the mother board. Is there a simpler solution than getting and installing a new mother board.

  • lfdenu Jan 24, 2009

    My screen is also dim and I am only able to read it if I shine a light bulb on it.  It was caused by dropping the computer.  Do you suspect this caused the inverter or the backlight to fail.

    Thanks for your help

  • Anonymous Apr 08, 2009

    My computer has pretty much the same problems as all these other ones: the back light doesn't come on. My dad and I have taken the computer apart using steps from a website to take the LCD inverter out and possibly cleaning it to fix it, but so far it isn't working. I honestly have no clue what's going on with this thing. I have a MT3707 though and I'm not sure if these steps will help this model. I really don't want to spend any money to repair my computer, so I can use all the help I can get.



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  • 188 Answers

Could be a lot of things: here is general tips for no backlight:

First if there is a suspend switch (usually right below the LCD sticking out of the notebook) make sure its not pushed down.

second: Did the LCD have a red tint before it failed? if not its probably the inverter. If it did then its probably the backlight, but its best to test the inverter using a known good LCD first.

If you dont have one, then any repair shop that deals with laptopsLCD display - 4.gif should be able to diagnose this pretty quickly (you shouldnt pay more than a 1/2-3/4 hour labor to take apart and diagnose.

if it really needs a backlight, it is a very difficult thing to replace the backlight - i see more people break the screen or electronics on the LCD trying to replace a backlight. always try an inverter first which is only about $20-$50 for the dells.

Its usually comparable in cost to buy an LCD ($100-$200 for the part on most models) than replace the backlight (150-220 is the typical labor charges i have seen. Just find out the part number of the LCD to match up a replacement. Try Bliss which sells screens on ebay - nice company to deal with and has a wide variety of screens,

Hope this helps!

Posted on Dec 21, 2007


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