Latitude E6400 LED display problem

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Latitude E6400 LED display problem

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I have just received my E6400. I am having this issue which happsns sometimes. The computer has a WXGA+, LED backlit display. I  have VISTA Business installed. The problem is that the LED display shows uneven distribution of backlight from the bottom of the screen. Please see the pictures.

 

http://i40.tinypic.com/10zwgw4.jpg

http://i42.tinypic.com/mrsacp.jpg

 

The thing is that this happens only when it wakes up from the sleep or hibernation mode. I restart the system, it does not happen. When this does happen, the screen completees turns to white, shows some lines for a second or two. I do not know what the problem is...Graphics card (dedicated NDIVIDA?). I do not think this is a hardware problem because the screen is, otherfwise, fine.

 

I hope to find the solution here!

 

 

All Replies
  • Since it's brand-new, I would not bother  troubleshooting - request a replacement system.

     

  • I'm curious what the resolution was on this.  I have a brand-new e6500 with exactly the same problem.

  • To clarify: my screen looks exactly like the images posted by the OP, but it is not an intermittent problem happening only after wake-from-sleep.  It's a permanent feature of the display.  The system is dual-boot, sometimes running Windows 7 and sometimes Ubuntu, and the screen looks the same with either OS.

  • This is an inverter issue and it needs to be replaced.

  • I am curious if these issues were ever resolved.  I have an e6400 that is out of warranty and the LED backlight has completely failed.  I am able to see a ghost image on the screen when illuminated by an outside light source such as a flashlight, but there is no backlight. Display is normal when connected to an external monitor, and I have attempted all software fixes such as adjusting brightness and disabling ambient light sensor.  I have also updated the BIOS with no results.

    I was told I would need a new display, but I would like to know if there is another potential cause such as an inverter or a fuse before I order an entire new display.

  • LED backlights don't use inverters - they use a converter board, which may or may not (usually isn't ) separately replaceable.  

  • Thank you for the reply, you got at the root of my question.  I am aware of a converter for the LED backlights, but I am questioning whether it is possible to replace just the converter, or if there is some other element, such as a wire harness or fuse, that could have caused my LED backlight to fail.

    I would like to avoid ordering a pile of replacement parts that I don't need