LCD Failures

Hardware failure – LCD, inverter, cable or backlight

Symptoms:

  • The laptop appears to start as usual but the screen is black, if you move it, it turns on and works properly. Failed cable.
  • The laptop appears to start as usual but the screen is very dark, although it changes colour a little and you can see a very feint image. Failed inverter or cable 90%/10%.
  • Immediately after starting the screen has dark pink/red tint and turns dark after a few seconds. Failed backlight.
  • The screen flickers a few times but then turns dark, if you move it or tap it lightly on the sides, it flickers again. Failed cable or LCD 50%/50%.
  • Screen is either black or white (no picture) and external monitor works. Failed cable or LCD 30%/70%.
  • There are stripes on the screen (either vertical or horizontal) that change when you move the screen or tap it lightly on the sides. Failed cable or LCD 10%/90%.

In all above cases, if you plug in an external monitor, everything shows fine on it (you have to plug it in before starting the laptop and may need to press the “Fn” key together with one of the “F1″ – “F10″ keys to make the laptop recognize the external monitor).

Troubleshooting:

If the screen is black, look for the “lid closed” switch and try pushing it a few times. It’s usually a small switch near the hinges that is pressed when the lid(the screen) is closed. Sometimes these switches get stuck in the “lid closed” position that results in black screen(no backlight) or non-starting laptop. Also some laptops have a magnetic switch (newer Dells, most Macs, etc.) that doesn’t get stuck.

The most common failures are (in this order): inverter, “lid closed” switch, cable, LCD, backlight.

194 Comments

  • #194 by Carla Wetta June 17, 2014 at: 5:46 pm

    I have a hp laptop that when it was closed the usb cord was laying inside… now i have a black strip with lines going across my screen… can someone tell me how i can fix this?

  • #193 by Waseema H. Qureshi April 2, 2014 at: 11:50 am

    by whq
    Hi everyone,
    My laptop turns on alright but the screen shows only horizontal coloured lines (not loading windows) and the screen slowly turns black. The machine seems to be in order as the fans work as well as the system indicators e.g. battery, DC power built in HDD and ODD lights flicker or keep on as usual, except for the light for multiple digital card slot, however.

    When the problem started I could yet get windows working in a usual manner by tilting the screen forward before turning on. But, at the moment that has stopped working and I am utterly frustrated. Help, pls. help1

  • #192 by noor noor April 1, 2014 at: 9:41 am

    To #186 Daniel Isom,
    Thank you for ur information. i had the same problem. i was ready to open the laptop screen, but suddenly i opened this site and found ur precious method. just by pressing the strip was removed and i jumped with pleasure. thank you Daniel Ison.

  • #191 by Kee March 1, 2014 at: 6:41 am

    I have a sony va10 has a broken screen sop i have to use an external display which was working fine, up untill a couple of weeks , i turn off the night as usual, next morning trying to turn the laptop on again, everything lights up as it should but i have no display, plzzzz help me. Thank you

  • #190 by harry December 19, 2013 at: 3:34 pm

    hi my laptop shows various lines and then hang up while working and when i restart it. after a long time of on and off it works properly

  • #189 by George Silver November 16, 2013 at: 1:28 pm

    My laptop screen, when turned on, shows a checkerboard pattern for half the screen and black for the other half
    Does not respond and does not display on an external monitor
    Anyone experienced this and why
    It is an ASUS laptop 12 months old

  • #188 by henry October 27, 2013 at: 9:16 am

    Please My laptop hp630 just started showing different colours especially pink with white lines and it starts changing to other colours. It started when someone tried turning off the system with some programs running. Knowing the programs were still running, i wanted to shut down properly only for the screen to start acting funny. I shut down severally to see if it would stop but it didn’t. Please help me

  • #187 by Daniel Isom October 9, 2013 at: 10:50 pm

    One more thing I forgot to mention is that the laptop I own is a Compaq Presario CQ56 model. I am sorry for the back to back posts.

  • #186 by Daniel Isom October 9, 2013 at: 10:48 pm

    Hi everyone, my name is Daniel Isom and I just wanted to share a way that you may be able to fix vertical or horizontal lines on a laptop screen. I had vertical and horizontal lines along the bottom half of my screen and know it can be a pain. I just wanted to tell you guys and ladies that if you take your index finger and press different areas around the side and bottom of the screen with just a little pressure you may fix your problem. Almost as soon i started pressing the particular problem i had with the colored lines is gone. I have tested my laptop with a full reboot, closing and opening the lid, and moving it around by carrying it from one side of my living room to the other and I have not had the problem come back so far. If anybody tries this method and finds that it works for them then I am very happy I was able to help.

  • #185 by was11 October 4, 2013 at: 9:09 am

    My laptop turn off unexpectedly & lately its gradually fading & showing colorful vertical stripes.Can anyone tell me the problem? & How to fix it? PLEASE Any Expertise on that.My laptop is Dell studio-1555.bought in 2009 october.Its been running fine for 4 years even without battery but for last 1 months its not.Just recently lines have been appearing on half of the screen.. then it just turns into blue screen but the other half is still clear.PLEASE need immediate HELP.