Troubleshooting backlight failure Laptop Repair 1.This laptop came for repair because of the LCD screen backlight failure.My customer complained that the laptop LCD screen is black but the laptop works with an external monitor.Here are my steps for troubleshooting this laptop with the backlight failure.First of all, I tested this laptop with an external monitor connected to the VGA port and the external monitor worked absolutely fine.I was able to get crystal clear image on the external screen even though the internal screen didnt light up.If the external screen works fine, then most likely there is nothing wrong with the video card.Notebooks/Dell/XPS_13_9343_6560_FHD/01neu.jpg' alt='How To Update Bios Dell Xps 8500 Manual' title='How To Update Bios Dell Xps 8500 Manual' />What graphics card Help on upgrading a graphics card on a Dell XPS 435 Dell XPS Studio 8100 Upgrading Graphics Card Dell XPS 400 Graphics Card Suggestions.Forex Margin Call Explained babypips.Learn what a margin call is in forex trading and watch how quickly you.Notebook display assembly diagram.After that I took a closer look at the laptop LCD and noticed that the screen is not completely black.The laptop screen still works but the image is very very dull, you barely can see it.It means that the screen still gets data signal from the video card, but for some reason the backlight lamp doesnt work.From my experience I know that this problem can be related the lid close switch, faulty inverter board or bad backlight lamp.I checked them one by one.If you have a similar problem, make sure the lid close witch moves freely.The lid switch is a small button located close to the LCD screen.This button triggers the hibernation or sleep mode when the screen is closed.If the lid close switch is dirty, it might get stuck inside the laptop case and cut off the power from the inverter board.The inverter board works as a power supply for the backlight lamp and if there is no power coming to the inverter board, the backlight lamp will not light up either.In my case the lid button worked properly, it didnt stuck inside the case. Mcafee Internet Security 2011 Serial New Upload 2011 Mustang . When I was pressing on the button very fast, I was able to light up the screen but only for a fraction of a second.The image wasnt bright and it had a pinkish tone.A pinkish tone usually indicates a problem with the backlight lamp, not the inverter board.Even though I suspected the backlight failure, I decided to test this laptop with a new inverter board just in case.But it didnt help.The screen didnt light up even after I replace the inverter board.So, I was right, this problem is not related to the inverter board.Finally, I disconnected the screen backlight lamp connector from the inverter board and connected my test backlight lamp I removed it from another cracked screen.You can find a new backlight lamp on e.Bay. Try to find a backlight with the connector already attached to it, so you can plug it into the inverter board.Make sure the connector on the backlight lamp is similar to the connector on your LCD screen.As soon as I turned on the laptop, my backlight lamp lighted up.Yep, thats the problem.The laptop screen has a faulty backlight lamp.Heres another laptop with backlight failure.This laptop video fails in a little bit different way.In this case the backlight lamp hasnt failed completely.The laptop starts with video on the screen but the background has reddish tone, the screen flickers and it makes noticeable buzzing noise coming from the backlight and inverter area.After a few minutes the backlight turns off by itself and the buzzing noise stops.When the backlight is off, the image on the screen is still visible but its very dark.I removed the screen bezel and connected my test backlight lamp.My test backlight works absolutely fine.The lamp doesnt flicker and there is no buzzing noise.So, this laptop needs a new backlight lamp.Upgrading My Dell XPS L5.Graphics Cardapoorvh.HI,I had recently opened up my dell L5.X for cleaning out the dust.Seems the graphics chip is just pasted onto the mainboard with gumpasteplastic.I have not tried to remove it but with correct tools, one should be able to separate it out of mainboard.That said, was wondering what new graphics chip I can put in in place of the original card.Any suggestions on compatible nvidia chipsThanks That paste you saw is actually the heat sink putty that transfers the heat from the chip onto the heat sink.I had actually changed out the putty on mine as my brother bought a tube and it was enough for two.As for the actual connection of the chip Usually they are soldered onto the board, and would require a soldering iron to remove.In regards to the NVidia chips, Im actually looking into this myself.Currently the NVidia GE Force GT 5.M that I have in here is terrible.Every so often, the game would lag and the sound would be jarred like you were playing something in extreme slow motion.At that point, the video would crash out, youd be sent to your desktop with a nifty Display driver stopped responding and has recovered Display driver NVIDIA Windows Kernel Mode Driver, Version XXX.XX stopped responding and has successfully recovered.I was told by my brother that the laptop and card combination is the cause of a massive headache that we are both having while playing games.Im about to look for some AMD options, before I just abandon ship on the Dell and find something else.Edit I would like to mention that I did try to have the most recent update in drivers, I did downgrade, clean install, etc.It literally has to be the compatibility of the card and laptop, or the fact that NVidia is doing a bad job in making a compatible driver for the card and the laptop.
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