Black screen on lcd Dell Studio 1558 but test Bist OK

Question

Hello, My two years Dell Studio 1558 LCD screen went black screen (very black just not dark) overnight without reason but : - there is really no display not even the bios  - External screen HDMI/VGA  works  - Dell LCD Bist Test (press FN key + D and power on) displays fine the colors red, green, white...on my LCD screen   - the LCD screen of this model don't have inverter. - I already try  to flash the bios with the latest version from an external screen but no improvement - I already try to remove my battery and stay several seconds press the power button I'm technician and usually when the display on the LCD screen no longer works but the display works fine on the external monitor I replace the LCD, but there with the test LCD BIST which sends the colors on the LCD screen that makes me think that the LCD screen is not dead so I don't know what to do/test. What other tests / checks can I do? with a voltmeter for example.

Dell-Rajesh R · Answer

Hi renzo08,To further isolate the issue, refer the following link for more troubleshooting:http://dell.to/1a1cNpELet me know how it goes.

renzo08 · Answer

Hello,

Thank you for your reply

Unfortunaly I 've already done these these tests (and I've already upgrade the BIOS in the latest official version available).

I consider that my LCD (full HD wxga AUO) is dead but I'm surprised that the LCD BIST test displays the five different colors on this one if this is the case.

So I would like to know if the LCD BIST can display colors on a LCD death and if so how.

Thank you

Laurent

soncio · Answer

Hi Man... Same happened to me today... I also tried to link it to another screen butbit doens t even recognize the input... Tomorrow ill go to the doctor... Ill let you know my news.. Do the same, ty...

DELL-Amogh G · Answer

Hi Laurent,

As the LCD BIST is passed and you are getting the display on the external monitor, it seems the issue is with the connection between LCD and motherboard. I would suggest you to reseat the LCD cable. If that doesn’t work you may try to replace the LCD cable. For owner manual, you may refer to the link: http://bit.ly/XRI614.

Hope this helps. Feel free to reply for any further assistance.

DELL-Amogh G · Answer

Hi soncio,

Please share the system model and the operating system installed.

You may try to run the LCD diagnostics on the system to check if there is any issue with the LCD of the system. Follow the steps below to perform LCD diagnostics:

Turn off the system
Press and hold down ‘D’ key on the keyboard while system is off
Now press the power button while holding down the ‘D’ key

If you get the solid colors flashing on the screen, LCD is working fine.

Keep me posted with the information. I will be glad to assist further.

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