Re: Dell Laptop LCD Repair--Part way there?

The inverter only powers the cfl tube. The LCD should function without it,
well it wouldn't light up but you could see something in the right light.
When people make LCD projectors out of these things you usually remove the
inverter board.

- Mike

"Iain E. Davis" <feaelin@xxxxxxxxxxx> wrote in message
news:g2dka1tvuo44npkblbsgpc4cb3q4jpa67s@xxxxxxxxxx
> I've been working on a Dell Inspiron 8100. The LCD was remaining
> dark, after bootup, but I could get a clear picture on an external
> CRT.
>
> I determined the problem was mostly likely to be the CCFL tube, so I
> ordered a replacement from JKL. The tube replacement went without a
> hitch, and now the display lights up when booting.
>
> However...the display is still unusable. I can see that output from
> the video card is reaching the display, because as the computer
> software boots, I can see the display change, for example when its at
> the "windows xp loading screen" I can see vertical lines running the
> full height of the screen approximately in the right place
> (horizontally) for the progress meter that XP displays at that stage.
>
> I checked to make sure the flex/ribbon cable had firm connections with
> the LCD and the video card...without any appreciable improvement.
>
> My working theory is that I need to replace the ribbon cable, that it
> has developed a flaw.
>
> Does the inverter simply serve the same role as a the ballast in a
> traditional office or shop light? Or does it play other roles in the
> LCD operation?
>
> Iain
>


.

Relevant Pages

  • Re: Need help to diagnose laptop LCD problem
    ... I was planning to replace the inverter first to determine whether the ... can help me to decide whether it is the inverter or backlight at fault. ... display at start-up. ... resistance of the tube when it is cold. ...
    (microsoft.public.windowsxp.hardware)
  • Re: Need help to diagnose laptop LCD problem
    ... I was planning to replace the inverter first to determine whether the inverter or lamp was faulty but upon opening the package I discovered that the inverter sent was the wrong one. ... Before I go ahead and order another, I hope I can satisfactorily describe the problem so that someone can help me to decide whether it is the inverter or backlight at fault. ... The symptom started months ago with a reddish tinge to bottom half of the display at start-up. ... resistance of the tube when it is cold. ...
    (microsoft.public.windowsxp.hardware)
  • Re: Need help to diagnose laptop LCD problem
    ... I was planning to replace the inverter first to determine whether the inverter or lamp was faulty but upon opening the package I discovered that the inverter sent was the wrong one. ... Before I go ahead and order another, I hope I can satisfactorily describe the problem so that someone can help me to decide whether it is the inverter or backlight at fault. ... The symptom started months ago with a reddish tinge to bottom half of the display at start-up. ... resistance of the tube when it is cold. ...
    (microsoft.public.windowsxp.hardware)
  • Re: Thinkpad T20 Backlight
    ... a T21 with a duff screen, ... Check the p/n & FRU on your existing inverter. ... Replacement of the part from the lcd housing's not too bad, ... whether it's an invertor or tube. ...
    (uk.comp.sys.laptops)
  • Re: Thinkpad T20 Backlight
    ... Check the p/n & FRU on your existing inverter. ... Replacement of the part from the lcd housing's not too bad, ... whether it's an invertor or tube. ...
    (uk.comp.sys.laptops)
Loading