TC-55CX400U Panasonic TV red light but black screen

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA
    #21
    Re: TC-55CX400U Panasonic TV red light but black screen

    VCOM, VDD, etc. are on the T-CON board.
    At this point it is not clear to me if you have backlights or not.
    Last edited by budm; 01-18-2019, 10:22 AM.
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809

      Comment

      • observer247
        Member
        • Jan 2019
        • 13
        • USA
        #22
        Re: TC-55CX400U Panasonic TV red light but black screen

        I checked with a flashlight, did not see anything on screen. Also I did not see any light in the dark.

          Comment

          • nomoresonys
            Badcaps Legend
            • Jan 2013
            • 12206
            • U.S.
            #23
            Re: TC-55CX400U Panasonic TV red light but black screen

            Ok, so what next? try to unplug powerboard from mainboard and force on powerboard?
            Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

              Comment

              • observer247
                Member
                • Jan 2019
                • 13
                • USA
                #24
                Re: TC-55CX400U Panasonic TV red light but black screen

                I think I tried this too. I will try again. So I think I did this:

                Removed the cable that goes from powerboard to mainboard. And pressed on the power button to see if the audio plays or there is any change in display. No nothing happened.

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