JVC EM55FT everything ok but cannot find any channels

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  • captainKKK
    Badcaps Veteran
    • Sep 2018
    • 287
    • United States

    #1

    JVC EM55FT everything ok but cannot find any channels

    Have done a reset. Can get the menu and when auto scanning for OTA channels is finds none of the 45 channels that my other TVs find. What to check first?
  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12075
    • U.S.

    #2
    Re: JVC EM55FT everything ok but cannot find any channels

    Did you try firmware update and or factory reset?

    Comment

    • budwich
      Badcaps Legend
      • Jul 2015
      • 3097
      • Canada

      #3
      Re: JVC EM55FT everything ok but cannot find any channels

      have you selected "antenna mode" in the menu (as opposed to cable).

      Comment

      • captainKKK
        Badcaps Veteran
        • Sep 2018
        • 287
        • United States

        #4
        Re: JVC EM55FT everything ok but cannot find any channels

        Thanks for your replies. I have reset the TV. Then scanned for channels using the "antenna" mode which is an outside antenna that works well for all my TVS. I have NOT done a firmware update b/c my ordered JVC remote has not arrived yet. I would love for this dumb TV to come back to life. Will update when the remote arrives. I may hook the computer to one of its HDMI and see what happens

        Comment

        • budwich
          Badcaps Legend
          • Jul 2015
          • 3097
          • Canada

          #5
          Re: JVC EM55FT everything ok but cannot find any channels

          that would be a good idea especially if you don't know the tv's history. Just to be sure we understand, can you post a picture of the menu that you used to set "antenna"?

          Comment

          • captainKKK
            Badcaps Veteran
            • Sep 2018
            • 287
            • United States

            #6
            Re: JVC EM55FT everything ok but cannot find any channels

            Got the remote control for it and same issue, no channels found. See pics. There are two different ways to scan for channels, using the attached outdoor OTA cable to the back of this TV, and specifying ANTENNA mode....neither find any channels.
            Attached Files

            Comment

            • budwich
              Badcaps Legend
              • Jul 2015
              • 3097
              • Canada

              #7
              Re: JVC EM55FT everything ok but cannot find any channels

              :-(

              have you got any "base video sources" (ie. cable box, vcr, video camera) that you can try inputting? do you get a different response if you choose "cable"? have you checked the input connector with a meter to see if is not shorted?

              Comment

              • captainKKK
                Badcaps Veteran
                • Sep 2018
                • 287
                • United States

                #8
                Re: JVC EM55FT everything ok but cannot find any channels

                Thx Budwich. I did try scanning using the "cable" and still no channels found. I did plug an active HDMI computer into two of its HDMI ports and got no response. No. I have not checked grd on the input, but will do so in the morning. I guess I'll have to crack this open and take a look.......?

                Comment

                • budwich
                  Badcaps Legend
                  • Jul 2015
                  • 3097
                  • Canada

                  #9
                  Re: JVC EM55FT everything ok but cannot find any channels

                  hold it... you plugged in a hdmi cable (and input a displayable signal ... dvd etc) and do not get a picture?

                  Comment

                  • captainKKK
                    Badcaps Veteran
                    • Sep 2018
                    • 287
                    • United States

                    #10
                    Re: JVC EM55FT everything ok but cannot find any channels

                    This TV was NOT recognized by my computer, and thus did not show picture, so maybe the HDMI ports on the TV are bad? I am going to try other inputs in a bit and a different computer or output from another HDMI device.

                    Comment

                    • budwich
                      Badcaps Legend
                      • Jul 2015
                      • 3097
                      • Canada

                      #11
                      Re: JVC EM55FT everything ok but cannot find any channels

                      ah.... it appears that your problem is wider than "no channels".... you likely have a significant main board problem that is impacting all inputs on that board. You should probably start checking voltages on the main board to see if any are missing.

                      Having said that, using an hdmi from a computer isn't the best way to test ports. This is because computers can easily set a resolution that is NOT supported by an external display and result in no picture. Get a cheap dvd player or otherwise to confirm operation of hdmi.
                      Last edited by budwich; 03-06-2020, 01:09 PM.

                      Comment

                      • captainKKK
                        Badcaps Veteran
                        • Sep 2018
                        • 287
                        • United States

                        #12
                        Re: JVC EM55FT everything ok but cannot find any channels

                        thanks, a work in progress

                        Comment

                        • captainKKK
                          Badcaps Veteran
                          • Sep 2018
                          • 287
                          • United States

                          #13
                          Re: JVC EM55FT everything ok but cannot find any channels

                          The Antenna connector center pin is not grounded. The PS has exactly the correct output voltage values. The PS main cap voltage is 320vdc, cap rated at 450. The main board's central processor is warm. All the caps on the PS and main boards appear physically perfect. BLs On. Menu display perfect. Music Menu displays full screen image. DVD play plugged into all three HDMI ports do not display anything. Cannot find firmware. Cannot get into the factory mode. Have done reset from the menu. Channels scanned finds no channels. Advice now?
                          Attached Files

                          Comment

                          • budwich
                            Badcaps Legend
                            • Jul 2015
                            • 3097
                            • Canada

                            #14
                            Re: JVC EM55FT everything ok but cannot find any channels

                            well now you have "narrowed down" the problem.... :-) It is likely a problem with the main board which houses the inputs and conversions. The menus are generated internally and don't go thru much / any signal conversion / capture and the display basically works. You need to start checking voltages in and around the hdmi area especially 5v which is used in the protocol. When you try to select an hdmi input, what does the screen display? You can / should trace voltages coming from the PS to the main and into the main.

                            although hard to tell from the pictures, there appears to be some bulging of tops on some of the caps on the main board.... maybe.
                            Last edited by budwich; 03-07-2020, 12:59 PM.

                            Comment

                            • captainKKK
                              Badcaps Veteran
                              • Sep 2018
                              • 287
                              • United States

                              #15
                              Re: JVC EM55FT everything ok but cannot find any channels

                              When I have a device plugged to the HDMI port and change to that port it says "Checking Signal" and then "No signal". I will check the top and bottom of the caps again. Too bad I cannot find any historical common faults on this model. Also, I talked to the previous owner and this was used as a kids plaything, plugging and unplugging lots of HDMI toys, so I am going to have a close look for a damaged HDMI connector..
                              Last edited by captainKKK; 03-07-2020, 06:09 PM.

                              Comment

                              • CapLeaker
                                Leaking Member
                                • Dec 2014
                                • 7971
                                • Canada

                                #16
                                Re: JVC EM55FT everything ok but cannot find any channels

                                figures... another MSD main IC.

                                Comment

                                • captainKKK
                                  Badcaps Veteran
                                  • Sep 2018
                                  • 287
                                  • United States

                                  #17
                                  Re: JVC EM55FT everything ok but cannot find any channels

                                  Your are right. see pic and very small bump above the third row of letters, above the 1. What causes this, lightning strike or is this a high probability of more component failures on the tcon and PS boards? Can I replace the MSD?
                                  Can I use a different model board like I have a bad JVC mainboard JVC 3655-0852-0150 (3B). Can I use a JVC 3655-0852-0395 and or JVC 3655-0852-0395R, and or JVC 3655-0852-0150R replacement (R=roku?)
                                  Attached Files

                                  Comment

                                  • nomoresonys
                                    Badcaps Legend
                                    • Jan 2013
                                    • 12075
                                    • U.S.

                                    #18
                                    Re: JVC EM55FT everything ok but cannot find any channels

                                    .
                                    Last edited by nomoresonys; 03-08-2020, 02:13 PM.

                                    Comment

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