Latitude E6420 May Intermittently Display Red Wavy Lines on the LCD While Streaming Video

Latitude E6420 May Intermittently Display Red Wavy Lines on the LCD While Streaming Video

Article Summary: This article provides information on Latitude E6420's intermittently displaying red wavy lines while streaming video.

Table of Contents:
  1. Problem
  2. Solution


Intermittently, E6420's May Display Wavy Lines While Streaming Video

Users may report intermittent red wavy lines on the internal LCD screen of the E6420 while streaming video. This behavior has only been observed under the following configuration:

· Windows 7 32-bit or 64-bit
· Optimus™ disabled
· Dell nVidia driver version A03
· Docked in a Dell E-Port or E-Port Plus
· Connected to external monitor through onboard video ports


Update The nVidia Driver And Re-enable Optimus™

This is not a hardware issue. The following options have been determined to resolve the issue:

    • Enable Optimus™ and allow Windows to utilize the hybrid video solution
    • Install the latest driver from nVidia

Enabling Optimus™ in the BIOS:

  1. Shut the system off.
  2. Press the Power button and immediately press the F2 button when the Dell logo appears onscreen.
  3. Select the Video Category in the left pane of the BIOS window displayed.
  4. Select the Optimus™ option.
  5. In the right pane, check the Enable Optimus™ box.
  6. In the lower right corner of the screen, click Apply and Exit. The system will reboot normally.

** Helpful Links **

nVidia Driver Support Site: nVidia

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Quick Tips content is self-published by the Dell Support Professionals who resolve issues daily. In order to achieve a speedy publication, Quick Tips may represent only partial solutions or work-arounds that are still in development or pending further proof of successfully resolving an issue. As such Quick Tips have not been reviewed, validated or approved by Dell and should be used with appropriate caution. Dell shall not be liable for any loss, including but not limited to loss of data, loss of profit or loss of revenue, which customers may incur by following any procedure or advice set out in the Quick Tips.

Article ID: SLN79950

Last Date Modified: 07/11/2013 12:00 AM

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