Inspiron 14 3420 - crashes and random horizontal lines poster model

I bought the Laptop Inspiron 14 3420 in December 2012. I am facing some problems of display on this laptop, it hangs and displays patterns of horizontal lines (like: http://www.youtube.com/watch?v=zOjTK4ic1E8) and it happens randomly and not always.
It happened a few months before and then automatically slipped, I thought that this could have happened due some application installation. But now its past very frequently, I don't know what is the cause.
I tried to change and update drivers display for both integrated Intel card graphics and Nvidia graphics card, but the problem is still there.
I tried Googling this problem and found that this could be the problem of Nvidia graphics card, so I have disabled this card from the Device Manager, but it does not solve the problem.
Can you please help me solve this problem

Hi mominbilal,

Try to release the residual charge of the system. Here are the steps:

  • Disconnect all external devices (printers, external hard drives, flash drives) on the computer, including the battery and the AC adapter / CC.
  • Press and hold the power button for 20 seconds.
  • Reconnect the battery and the AC adapter / CC. Try to restart the computer and check.

In addition, run 'Diagnostics' on the system to confirm the operation of the equipment. Here are the steps:

  • Restart the system and immediately start typing on the "F12" key to enter the "Boot Menu".
  • Press the "Down arrow" to select the option 'Diagnostics '. Press the enter"" key.
  • The diagnostics begin. Please note the exact error message / code, if everything appears on the screen.
  • You can also view the video on the link http://dell.to/17DCL0R for more information.

Check also if there is no problem with the LCD display by running LCD BIST (Built in self test). To run the LCD BIST, press in and hold the D key on the keyboard while pressing the power button, then release both buttons at the same time. This will launch a screen gray, then red, then blue, then green then white, to allow you to inspect the entire LCD to the purity of the color on each screen and to better identify defects such as cracks on the LCD screen or stuck pixels which is perhaps not obvious in normal display mode.

Try to connect the system to an external monitor when the issue appears to happen again if the issue reappeared on screen external source or not. This will help us to further isolate the issue.

Please answer with the information, I'll be happy to help you further.

Tags: Dell Laptop

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