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Hi,
Faulty CFL ( Screen Tube )
Faulty Inverter Board ( Tube starter-Booster )
Damaged faulty-loose Broken, Cabling.
Motherboard Fault.
Stuck screen plunger Button, or computer in Hibernate-Sleep Mode.

Mike @ compurepair.

Posted on Aug 02, 2008

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Screen is to dark. cannot see letters very well.


Suggest you press the Fn key And the key to increase brightness, first. (Should be a key that has a sun icon on it)

Barring this does not increase the visibility of your LCD screen, the I suggest the Backlight is bad, or the Inverter.

The Backlight is a type of CCFL tube (Cold Cathode Fluorescent Lamp) mounted to the LCD screen. The LCD screen needs the light given off of the Backlight.

Replacing the Backlight is a daunting task, and if done wrong, will cause possible damage to the LCD screen.

The LCD screen itself has a thin metal frame holding the components of the LCD screen together. This frame must usually be opened on the side that has the backlight, to access the backlight. The components that make up an LCD screen are fragile, and can easily be damaged.

The Inverter supplies power to the LCD screen, as well as the Backlight.
Inverters do go bad, but commonly it's the Backlight to go first.

This shows a typical Backlight replacement. It IS not an advertisement to attempt this yourself, but a reference tool for information.

http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/

Nov 16, 2009 | Itronix GoBook III Notebook

1 Answer

HP Pavillion F1503 screen has gone dark...background is very, very faint, barely able to see/read it. What is the problem? If it is a ''backlight'', then what exact is a backlight, what does it do, is it...


Most of the time in this situation, the problem is due to the backlight going out. However, there are some instances where the inverter cable is bad.

The backlight is the part of the LCD which illuminates the screen. Think of an LCD as having multiple layers. One layer has the image itself on a semi-transparent layer and then behind that layer rests the backlight (usually a florescent bulb) which shines through all other layers to make the image glow and illuminate.

More info can be found here:

http://en.wikipedia.org/wiki/Backlight

As far as replacing the backlight, I always replace the whole LCD itself, which includes the backlight.

Otherwise, you risk ordering the backlight and finding out that it was the connection from the backlight to the LCD that was causing the problem (very possible) and then you would have to order the LCD anyway.

Sep 05, 2009 | HP Pavilion F1503 15" LCD Flat Panel...

2 Answers

Backlight is off


You either have a bad LCD or bad backlight board. The backlight on your screen is no different than a light bulb. If it burn out it stops working, if these is no power to the backlight your screen will have an image but no backlight to see the image.

Jul 03, 2009 | Sony Cyber-shot DSC-T20 Digital Camera

1 Answer

Motorola Razr V3a Backlight Stays On


From the manual, p. 31:
"BACKLIGHT
Set the amount of time that the display and
keypad backlights stay on, or turn off backlights
to extend battery life.

Find it: (on menu) > Settings > Initial Setup > Backlight"

Jun 22, 2009 | Motorola Mobility RAZR V3

1 Answer

On my xps the lcd backlight wont turn on?


could be bad backlight or inventer.

do you see picture but just no backlight?

it could also be a loose connection between the display and the motherboard.

how to replace your laptops backlight:
http://www.instructables.com/id/How-to-Replace-Your-Laptop_s-Backlight/

replace inventer:
http://www.instructables.com/id/Replace-LCD-Backlight-Inverter-on-Any-Monitor-for-/

start by checking for loose connection between the lcd and the motherboard.

Jun 07, 2009 | Dell XPS M1330 Notebook

1 Answer

Backlight


I KNOW ABOUT BACKLIGHT.1st select mene option and go to setting.After go to display setting and go to backlight option and open it, on the backlight or set the time of backlight.

Mar 25, 2009 | Nokia 1600 Cellular Phone

1 Answer

"Upgrade" of Backlight Panel


just replace what failed.
I replace the surface mount FETs on the inverters.

Dec 03, 2008 | Sony BRAVIA KDL-40V3000 Television

1 Answer

No backlight


A couple things to try:

1st check the backlight settings

Turn on Backlighting and Control Brightness To use your device in dark environments, enable the automatic backlighting feature:
  1. From the Jump screen, press MENU t02003-15.gif then select Settings > Battery & Display.

  2. In the second group box, select the Turn on backlight when using device check box.

  3. Highlight, then select the Brightness slider to open it for editing. Roll the TRACKBALL right to increase brightness; roll the TRACKBALL left to decrease brightness. After you've made the adjustment, press the TRACKBALL to exit edit mode. t02007-55.jpg

  4. Select the length of time you want backlighting to stay on from the Turn off after pop-up menu.

  5. To use the device's light meter while the backlight is on, select the Use ambient light sensor check box.

  6. Press JUMP t02003-14.gif to return to the Jump screen and save your setting.
Now, when you press any button or key, or flip open the screen, backlighting will turn on for the set amount of time. Note that as long as you press a key or button before the set time elapses, the backlight will stay on.
Tips:
  • Even if you have not selected automatic backlighting, you can turn on backlighting at any time by pressing MENU t02003-15.gif + JUMP t02003-14.gif . The backlight will remain on for the time specified in the Backlight Turn off after pop-up menu.

  • When in key guard mode, you can turn on the backlight by pressing the RIGHT SHOULDER t02003-66.gif button.
If it still does not work, then you can try resetting the flex cable to the lcd.

Reseat the SidekickFlex cable

If that doesn't fix it then a new lcd assy will take care of the issue. they run about 45 dollars on ebay.

Sidekick LCD screens

Apr 26, 2008 | T-Mobile Sidekick® 3 Cellular Phone

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