My display becomes so dim that it is not visible when i boot up, but after saverl efforts of restart / hibnation/ power off and teh on it finaaly some how solves the problem,
I have tried to find teh display driver on line but can,t
can any body hepl me out of this?
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If your laptop appears to boot up and the hard disk LED flashes, then the problem is probably a back light fault. This can be a faulty inverter or a faulty CCFL lamp. Please click on this link and follow my instructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen
I have come across this problem, the backlight behind the LCD dims without warning and the only way to fix this issue is replace the backlight, a very difficult repair, mine like yours was a Compaq. Most professional will opt to replace the entire screen.
If your laptop appears to boot up and the hard disk LEDflashes, then the problem is probably a back light fault. This can be a faultyinverter or a faulty CCFL lamp. Please click on this link and follow myinstructions to identify the fault and possible fix :-
boot to the BIOS (F2 at boot) and ensure that the LCD brightness is set to 8 and then reboot, if LCD is still dim, then, check the Control point system manager display settings and see if the LCD is dimmed there.
If no change, run diags Power + D at boot to run the LCD BIST test , if the 4 colored screens are DIM during the test, then the LCD has failed and needs repplacement.
It could either be your power settings dimming it (battery saver mode), or more likely when you replaced the screen, you replaced the backlight with the one that came with it. The replacement backlight is probably not as good as the one you had. You can try putting your other backlight in it (the backlight is that circuit board near the hinge that you plug in when you switch the screens out). Since it's going in and out, I'd check the power settings first though.
Defective CCFL backlight may has the following symptom:
Screen flashs on red/pink and off.
Picture stays on in red and slowly be come normal.
Picture flickering with dim display.
Picture flickering on and off.
All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp
Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.
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 www.lcdparts.net for parts, repair service and DIY info.
When you start the system, press F8 and then select "Last known good configuration". If it does not work the first time, try at least three or four times.
You can try installing the OS again but you will lose the data in your c drive.
Check with the BIOS configuration, Take a note of the original configuration before you make any changes.
Try connecting an external monitor to the Dell Latitude D820. If the monitor display is fine, then your laptop’s LCD display panel is defective. If the monitor has no display, then your problem is with either the video card or motherboard located inside your laptop.
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