2011 rca 46la55r120q led tv - backlight works, no picture, no sound

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  • kburks1230
    Senior Member
    • Mar 2010
    • 87
    #21
    Re: 2011 rca 46la55r120q led tv - backlight works, no picture, no sound

    Originally posted by tom66
    Hmm, yeah, I looked closely at that board again and the power for the t-con passes straight through the board. Not sure what else to suggest; looks like your main board is bad.
    I replaced the main board, now I have 12v on the 4 red wires where there was no voltage before. I also replaced the TCON board and still have something like .3v on the fuse on the TCON board. What the heck?

    I still have the same problem, no pic or sound...

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK
        #22
        Re: 2011 rca 46la55r120q led tv - backlight works, no picture, no sound

        Could be a broken connector or wire assembly?
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

          • kburks1230
            Senior Member
            • Mar 2010
            • 87
            #23
            Re: 2011 rca 46la55r120q led tv - backlight works, no picture, no sound

            What about this board:
            This board goes between the main board and the TCON board:
            DIGITAL BOARD RE3342B051-C1

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK
                #24
                Re: 2011 rca 46la55r120q led tv - backlight works, no picture, no sound

                Can we get a pic of it? Could be motion FRC for 120Hz picture.
                Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                  Comment

                  • lalin
                    M
                    • Apr 2015
                    • 20
                    • us
                    #25
                    Re: 2011 rca 46la55r120q led tv - backlight works, no picture, no sound

                    Is this the best way to know the logic board is working, to test the voltages coming out of it? thanks

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