Alienware 17 R5. Does not recognise LCD...

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  • Weelcup
    TopTech
    • Oct 2017
    • 302
    • UK
    #21
    Re: Alienware 17 R5. Does not recognise LCD...

    Originally posted by khaahk
    There are ton of topics regarding alienware machines with nvidia gpu-s and w10 making lcd-s not working. The topics indicate that the edid information stored in panels get corrupted and then follows the LCD not detected error.
    But if you have tried working screen then that should not be the case.

    Check EDP data lines in diode mode to see if they measure the same.
    I think i should consider this. I thought the issue is with the edp cable. Giving the fact that 4k versions screens have dfferent edp cables than full hd ones.

    I have tried 3 screens the FHD QHD and 4K ones.

    Now the full hd one is working for sure. But both others were from other shopes which claimed to be working. In fact, the 4K one is assumed new and never been used. Which i am keeping now.

    Now i believe i would be able to program the edid if i disassemble the lcd frame. but not having the edid software would be missing.


    I am still wondering if the missing +LCDVDD is causing the issue. Was not it supposed for the lcd to get the +lcdVDD to produce the sense of being connected? I might be mistaken but with the LD-D753P the +LCDVDD is privided even without connecting the edp lcd cable on the motherboard side.

    But i am not sure if this model LA-F552P would provide that signal initially.

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      • khvkdv
        New Member
        • Dec 2019
        • 2
        • Russia
        #22
        Re: Alienware 17 R5. Does not recognise LCD...

        Hello. How did it end? I have the same problem.

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          • ktmmotocross
            Boardkiller
            • Feb 2014
            • 3577
            • slovakia
            #23
            Re: Alienware 17 R5. Does not recognise LCD...

            check multiplexer ics with scope
            Last edited by ktmmotocross; 11-07-2021, 10:34 PM.

              Comment

              • khvkdv
                New Member
                • Dec 2019
                • 2
                • Russia
                #24
                Re: Alienware 17 R5. Does not recognise LCD...

                what exactly to test a multiplexer with an oscilloscope?

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