Hello all.I have a Dell Latitude D600 and at random times the display will flicker with horizontal lines. I can sometimes agitate it by gently twisting the LCD and it will flicker. I've done some research before and thought the problem would be the flex video cable, which I ordered and installed, but it still flickers. The LCD looks cosmetically perfect, as well as the inverter. The display backlight isn't flickering, rather there are white lines that flicker randomly, so I don't think it's the inverter.I hooked it up via VGA to an external machine and only the laptop suffered the flicking so I believe that the graphics card is fine. Here's a video on what I'm talking about.Dell Latitude D600 Display Flickering - YouTube-Dustin
I replaced both the LCD and Inverter (cheap together) and the screen is no longer flickering.
To be sure about the issue with LCD or LCD cable, you can check if the computer works perfectly fine with external monitor. Also, you can run a test on the LCD of your computer. You can watch the detailed steps and how to run LCD BIST from link: http://dell.to/R6XKBV.
You can check an image below for the LCD flex cable:
LCD and LCD cable is not a customer replaceable unit as it requires a lot of expertise. If you are comfortable reseating the LCD cable, you can check the link: http://dell.to/WfB2co for detailed information on re-seating the LCD cable.
Note: Please ensure to follow the safety instructions mentioned in manual.
If the issue persists while running LCD BIST and re-seating LCD cable, it might be an issue with the LCD.
Please reply for further clarifications.
Thanks and Regards,Chinmay S#iworkfordell To know more about Dell’s products, services and drivers & downloads, please go to http://dell.to/10GaKAc
Thank you for your reply. In my original post, I stated that I ordered and installed a flex cable already. The display works fine with an external monitor, too.
I tried the F12 Diagnostics and it said that the LCD Inverter Detection Test failed. I'm guessing then it's a bad Inverter. I always thought the inverter just converted the power and provided backlight.
Are there any other tests I should run or do you believe that replacing the inverter will fix the flickering.
If the issue still persists after replacing the LCD cable and system works fine with external monitor. It should be an issue with LCD and need replacement.
I am glad that the issue is resolved.
Please feel free to get in touch in case you have any further questions.