Question about Dell Latitude D800 Notebook

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I've a Dell D800 and the LCD brightness is extremely poor. I've replaced the inverter board with the same result. Where do you look now?

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Check the LCD screen cable. It might be defective.

Posted on Sep 18, 2010

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1 Answer

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That board will be almost impossible to find replacing the capacitors will usually solve the issue in most cases especially if you see swelled caps.

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Measure the input voltage to back light inverter board, from the main power regulator board. If it is found OK, replace back light inverter board.

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Hi there, my six year old dell latitude D800 lcd goes dark (not completely, but unreadable); (first brightness was jumping down and up). Two years ago I had such problem and solved by replacing the lcd...


Sorry to hear that, Paul. As far as notebooks displays go, the light behind the screen is the part most likely to go out. It generally does just that: it just goes out, though the screen itself works (the LCD is still generating a picture, which you said you can still see). Whether you run it dim or bright doesn't play much of a role.
Another inverter replacement is probably needed here, with the light itself (what the inverter is powering) an somewhat less likely explanation. In any case, the notebook will have to be opened up to do the work, where is where a lot of the cost comes from (unless you or a friend is doing the work for you).

Good luck!

Aug 08, 2011 | Dell Latitude D800 Notebook

1 Answer

D800 screen goes very dim. Looks like it is off, but if I look really close I can see it is still on.


1st change screen inverter if same then u need to replace LCD thats it .. Thanks

Sep 14, 2010 | Dell Latitude D800 Notebook

2 Answers

Dim screen


Its going to be either the lcd or the inverter more then likely. Go ahead and unhook the lcd cable from the motherboard and the back of the LCD. Reseat the cable into the LCD and the motherboard. If its still dim then the best thing to do is to replace the LCD cause it comes with the inverter.

Apr 28, 2010 | Dell Latitude D800 Notebook

3 Answers

My dell e1404 laptop is having a issue with the screen. When you turn on the computer the screen will come on for about 30 seconds and then go off. When it's on everything looks normal. once it goes out...


The inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. The inverter board converts low voltage DC power (few volts) supplied by the motherboard to high voltage AC power (few hundred volts) needed for the backlight lamp.
When the inverter board works properly, the backlight lamp gets power and the LCD screen lights up. As a result, the image on the screen is bright. If the screen is dimming down, means that the inverter is failing in it;s job to supply the needed voltage to the Backlight.
The Inverter is mounted underneath the display screen and is connected by a two wire plug.

Nov 07, 2009 | Dell Inspiron E1405 Notebook

1 Answer

WXGA Display for Dell Latitude D800 Problem. When


replace either your cold cathode screen lamp or, your inverter board in your display

Aug 28, 2009 | Dell Latitude D800 Notebook

2 Answers

Where is the LCD backlight inverter on an Inspiron


The inverter is in the LCD, below the actual screen. It controls the brightness and the contrast on the laptop. Here is a link where I purchase them:
http://www.smartmicrousa.com/dell-inspiron-e1705-laptop-inverter-board.aspx

It is easy to replace. Here is a link that will guide you:
http://www.ehow.com/how_4841734_dell-laptop-inspiron-e-backlight.html

Apr 21, 2009 | Dell Inspiron E1705 Notebook

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