Question about E-Machines M6811 Notebook

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Dim sreeen on hp ze5620us

How can I brighten my screen on the HP ze5629us? I have change the inverter and the screen is still dim. The Picture quality is poor and I have a problem with the screen flickering or blinking. Can you help?

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On 6811's over time the contact wires inside of the base of the laptop become loose from their screws from opening and shutting of the laptop. Poor design open the case if you are familiar with computers and take a terminal cleaner and rough up the ends of the contacts then secure them tightly again making sure you gave them enough slack to close the laptop without strain on these wires.

Posted on Sep 08, 2008


Follow this procedure to troubleshoot an incorrect display on a monitor using the Microsoft® Windows® XP operating system.

IMPORTANT: The procedure below requires a user account with administrator rights.

NOTE: Some monitors must be turned on after the computer is turned on.
Degauss the monitor by turning the monitor off, waiting a few seconds, and then turning the monitor back on.

This may need to be done several times before a degauss is successful.
Some monitors may require up to 20 minutes between degaussings for an optimal effect.
Reset the monitor to factory defaults.
Configure the monitor in VGA Mode.

NOTE: Follow this procedure to reset a Sony® monitor.
Verify the correct monitor resolution is selected in Display Properties.

NOTE: If the monitor is a CRT (Cathode Ray Tube), it may be necessary to adjust the monitor refresh rate to eliminate flicker.
Ensure the color depth is at least High Color 16bit.
Remove any large electrical devices or speakers from the vicinity of the computer.

NOTE: This includes devices plugged into the same power strip as the monitor.
If using a CRT (Cathode Ray Tube) monitor, turn off any fluorescent lighting.
Disconnect and reconnect the monitor to the computer, ensuring there are no bent pins or broken connectors.

If using an available BNC connection for the monitor, ensure the 5 BNC connectors are in the proper order, red, green, blue, horizontal synchronization, and vertical synchronization.
For monitors which support both a BNC and a HD15 connection, ensure the monitor is configured to use the current connection type.
For monitors using both an analog and a digital connection, use only one connection type to the computer.
Wiggle the video cable where it connects to the monitor to ensure the cable does not have a short. If this causes the problem to go away and then come back, the monitor may need to be serviced.

NOTE: If a video pass-through card is used, bypass the video pass-through connection and connect from the monitor directly to the video card. If the problem is resolved the video pass-through connection may need to be replaced. Contact the manufacturer of the video pass-through hardware.
Remove any video extension cables.
Perform a monitor self-test to ensure the monitor is functioning correctly.

NOTE: Follow this procedure to perform a self-test on a Sony® monitor.
Try the monitor in a different room. If successful, suspect an EMI (Electromagnetic Interference) or AC voltage problems in the original room. A line conditioner can be purchased from a local retailer to help resolve voltage problems.

NOTE: A line conditioner is not guaranteed to resolve this issue.
Try the monitor on a different computer.
Perform a system restore to a time when the computer was functioning properly.
Restore the video drivers.

Posted on Apr 12, 2008

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The backlight is probably failing if it is still flickering - does the screen start out pink/red when you turn it on?

The best way to tell is to plug in a known good LCD and verify it lights up properly.

Posted on Dec 21, 2007

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Posted on Jan 02, 2017

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1 Answer

I have alenovo t420 laptop that brightens and dims every second or so . tried diablind the automactic brighten button under intel but this didn't work . am at a lost and need help .

Is it problem accours in another monitor that pluged to your notebook? If no, the possibility is inverter failure. Try to replace the inverter to your service centre

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go to the search icon under start. search brightness. it will tell you step by step what to do.
Every laptop is different, so adjusting the brightness or contrast on your laptop may vary from the steps provided on this page. However, understanding the process of how to adjust the brightness or contrast will help you change your settings.
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The screen's back light seems to be off but i can

Either the lcd inverter or the lcd itself is bad. If the machine is under warranty then call HP to get it serviced otherwise

254108-001 is the part number for the lcd

Couldn't find the part number for the inverter board but I found one on Ebay here:

Jan 23, 2010 | Compaq Presario 700 470024-192 Notebook

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Monitor is dim

Sounds like your inverter is failing. The inverter takes the dc power from the battery and charger and converts to high voltage AC current for the backlight lamp inside the screen. When the inverter starts to fail, the display will sometimes blink, dim out over time, flash just get dark and stay that way.

Sep 28, 2009 | Toshiba Satellite A215-S7422 Notebook

1 Answer

My laptop screen is very dim, cannot read or see looks faded

Try using the brightness controls on your keyboard to brighten the screen. If that doesn't work then that means either the lcd or the inverter has gone bad.

Apr 14, 2009 | Computers & Internet

2 Answers


You can brighten or dim the LCD screen by pressing the Fn key plus another key with the a sun symbol eg the UP & DOWN arrow keys or one of the F3 to F12 keys - it varies depends upon the model of the laptop.
If you cannot vary the brightness of the LCD screen the you have a faulty backlight.

Connect an external monitor to the laptop and power it up, if you see a clear image on an external monitor, this means your video card is OK.

If you see a dim image or flicking image on the LCD screen it means you have a backlight problem.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out for parts, repair service and DIY info.

Mar 14, 2009 | Toshiba Satellite A100-S8111TD Notebook

1 Answer

Hp laptop 9720us screen wont brighten or dim. last week my screen went blank brought it to a shop they changed the inverter and also some cable connection . works fine just not quite as bright as before ....

You got the wrong inverter fitted - i'm sure your unit requires a sinle lamp inverter and they have cheated - putting in a generic lamp inverter and branching togeather the wires to accomodate the single plug thus reducing the available volatage for the lamps - this is why it's dim - correct part is 431391-001 Display panel power inverter - For use with single lamp display panel

Mar 10, 2009 | HP Pavilion DV9720US Notebook

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Screen on Aspire 3000 is very very dim

Backlight or inverter failure sorry to say. No telling which without substitution. Backlights are mostly built into the top of the screen and are tricky to replace. Inverters are generally sited at the bottom of the screen under the facia panel. Look around ebay for replacements

Dec 09, 2008 | Acer Aspire 3000 Notebook

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Dark scree

I too have the same problem with the same monitor.. tv looks great OSD looks great.. pc is dim.. This has nothing to do with the inverter board or the backlight.. I believe that there is an issue with the components that render the Computer video.

Jan 17, 2008 | Samsung SyncMaster 17" TFT LCD Monitor

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