Hi...I have a dell inspiron. When plugged into the electrical outlit, after boot up, within 5 minutes or less, the display goes black. I can see my deshtop, but bearly. Now, if I do the same thing with the unit not plugged in (using battery power) this doesn't occur....any suggestions ????
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When you say screen goes very dark when it booted to windows so it means that when you turned on the laptop when the dell logo flashes the screen was fine? if thats the case could you please try this. after turning on the laptop you will see the dell logo flashes immediately keep tapping on F2 and then it will show you the BIOS setup utility, please check if in BIOS setup display goes dark as well. If yes then try this, after turning on the computer when dell logo flashes keep tapping on F12 to boot menu then select utility partition to run the diagnostics. Please run test on the LCD check if display goes black when running the LCD test. Then try this when you sees the dell logo keep tapping on F8 to boot in safe mode check if in safe mode display goes very dark. Try this too, boot in F8 then select last known good configuration check if the settings on your display will be fix. If you can boot to safe mode no problem then uninstall the display or video driver. then restart computer.
You can also try to connect an external monitor if you have one just try to isolate if issue is on the LCD or the video card. If the display is dark as well in external monitor then video card needs to be reseated if fails then replaced. In situation like this most video cards is integrated to the motherboards. So replace motherboard.
Boot the machine into safe mode. Right click on My Computer (XP) Computer (Vista) and select manage from the sub menu. When the window pops up select Device Manager. A device list will populate. When it has look down the list for Display Adapters. Click on the + icon next to Display Adapters to it expands. Right click on the display adapter and select uninstall.
Restart the computer and let it boot in normal mode. If it boots in normal mode let it detect the Display and install the drivers for it. I would be a good idea to update the display drivers via the Dell support website.
If it still won't display in normal mode please post back.
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.
If you see a very dim image or black screen or flicking image on the LCD screen it means you have a backlight problem.
The buzzing sound is most likely the inverter 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 www.lcdparts.net for parts, repair service and DIY info.
For the first problem, try reseating the memory and the battery, see if any thing happens if you leave the battery out and plugged in using the AC adapter only.
For the second problem, try removing the battery for about 10 minutes then after installing the battery power up and see if the display if full again, if so grate, if not, you will probably need to have a tech fix it, as either the display is bad or maybe the connector inside the laptop became loose and should only be repaired by a qualified technician.
There's probably a problem with your display drivers in XP. Try booting in Safe Mode (F8 on startup). Now your display should work. If you boot in safe mode with networking, you can visit the graphics-card manufacturer's website and download the latest drivers. After installing these, try rebooting normally...
My guess is that your laptop's graphics card is goinf out on you. If your computer has an Intel embedded graphics card, then you will probably have to replace the whole display itself; if it has a dedicated graphics card such as NVIDIA or ATI, then you ight only have to have the graphics card.