Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

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  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12081
    • U.S.

    #21
    Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

    Originally posted by kevinm34232
    Did not try yet, will try shortly. It's questionable if it will accept the USB drive without being able to power up.

    update:

    TV will not take firmware file automatically...
    .
    Last edited by nomoresonys; 05-16-2018, 09:03 PM.

    Comment

    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA

      #22
      Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

      Service manual on post #2, if you look at PDF page 30 LVDS connector, there is pin called 'PANEL ERROR' pin.
      Your panel is Samsung so SLCD looks to be the one for your TV, you can verify the pin out.
      Last edited by budm; 05-16-2018, 10:32 PM.
      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

      • Andrew F. Ali
        Badcaps Legend
        • Jan 2014
        • 2450
        • Trinidad & Tobago

        #23
        Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

        So what do we have on a recap:
        1. TV switching on and staying on
        2. Backlight turn on and stay on
        3. All signals from the Main Bd. and voltages on PSU are present, except
        4. T-CON ON signal from Main Bd.

        If you connect the 3.3V to the T-CON ON wire on the PSU you would have to make sure and disconnect it from the Main Bd. You would have to cut to wire midway of the connectors to leave enough space to join it back up.
        Just leave it connected long enough to see if there is an image on the Screen/Panel.
        If you get an image, then the Main Bd. is faulty.

        Comment

        • kevinm34232
          Badcaps Legend
          • May 2012
          • 1884
          • USA

          #24
          Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

          TV does not turn on and stay on. Instantly 5 blink code.

          Comment

          • Andrew F. Ali
            Badcaps Legend
            • Jan 2014
            • 2450
            • Trinidad & Tobago

            #25
            Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

            OK. I am now thinking your Main Bd. is bad and you should look for a replacement board. I think.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #26
              Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

              Originally posted by kevinm34232
              TV does not turn on and stay on. Instantly 5 blink code.
              Did you look at the 'PANEL ERROR' pin?
              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

              • Andrew F. Ali
                Badcaps Legend
                • Jan 2014
                • 2450
                • Trinidad & Tobago

                #27
                Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                Your Main Bd. Nos. would be
                1-895-172-11
                (1P-011BJ00-4011)

                Comment

                • nomoresonys
                  Badcaps Legend
                  • Jan 2013
                  • 12081
                  • U.S.

                  #28
                  Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                  Faulty eeprom?

                  Comment

                  • nomoresonys
                    Badcaps Legend
                    • Jan 2013
                    • 12081
                    • U.S.

                    #29
                    Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                    Looks like you need to find out why there's no tcon on signal coming from mainboard, did you check everything on tcon with your meter?

                    Comment

                    • nomoresonys
                      Badcaps Legend
                      • Jan 2013
                      • 12081
                      • U.S.

                      #30
                      Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                      A schematic of the mainboard would help.

                      Comment

                      • Andrew F. Ali
                        Badcaps Legend
                        • Jan 2014
                        • 2450
                        • Trinidad & Tobago

                        #31
                        Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                        Originally posted by budm
                        Did you look at the 'PANEL ERROR' pin?
                        Did you follow up on this to see if there is any voltage at that pin?? Of course this would be with everything connected.

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #32
                          Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                          Sorry about the schematic for the main board, this is the one I am referring to:
                          Attached Files
                          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

                          • kevinm34232
                            Badcaps Legend
                            • May 2012
                            • 1884
                            • USA

                            #33
                            Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                            Originally posted by budm
                            Did you look at the 'PANEL ERROR' pin?
                            I will check the that pin when I get home and follow up thank you..

                            Comment

                            • nomoresonys
                              Badcaps Legend
                              • Jan 2013
                              • 12081
                              • U.S.

                              #34
                              Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                              Page 13 in budm's service manual looks good, maybe you can trace the tcon on wire back to mainboard then follow the traces to where they go, did you check those two IC voltage regulators right by the connector and any fuses you might have?
                              Last edited by nomoresonys; 05-17-2018, 04:11 PM.

                              Comment

                              • nomoresonys
                                Badcaps Legend
                                • Jan 2013
                                • 12081
                                • U.S.

                                #35
                                Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                                http://assets.shopjimmy.com/media/ca...M/IMG_1134.JPG pic. of mainboard.

                                Comment

                                • kevinm34232
                                  Badcaps Legend
                                  • May 2012
                                  • 1884
                                  • USA

                                  #36
                                  Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                                  I had no luck when I searched for a main board the other day, it's gonna be one of those hard to find ones..

                                  But first let's determine if it's that board for sure.

                                  Comment

                                  • nomoresonys
                                    Badcaps Legend
                                    • Jan 2013
                                    • 12081
                                    • U.S.

                                    #37
                                    Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                                    Originally posted by kevinm34232
                                    I had no luck when I searched for a main board the other day, it's gonna be one of those hard to find ones..

                                    But first let's determine if it's that board for sure.
                                    If I recall, the 40, 46 and 55 ex640 will all work.

                                    Comment

                                    • nomoresonys
                                      Badcaps Legend
                                      • Jan 2013
                                      • 12081
                                      • U.S.

                                      #38
                                      Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                                      Ebay Hong Kong 110 U.S plus 10 shipping, might need to translate page, your right sold out about everywhere, saw one for 192 bucks but that's sick.

                                      Comment

                                      • kevinm34232
                                        Badcaps Legend
                                        • May 2012
                                        • 1884
                                        • USA

                                        #39
                                        Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                                        Ya not spending that much on an older 46", not worth it.. thanks for looking though..


                                        Budm as for the PANEL ERR#:

                                        On initial plug in to AC and/or each time power button is pressed, pin goes to 0.872V, then drops quickly back to 0V.

                                        The same thing happens if I disconnect CN4002 (the other LVDS connector), or either one or both of the ribbons going to the panel.

                                        With the T-Con completely disconnected from main board, PANEL ERR# goes to 3.3V immediately.

                                        Not sure what to make of that voltage reading whether it should be low or high..

                                        I tried grounding out the 3.3V PANEL ERR# pin with the T-Con disconnected, same 5 blinks.
                                        Last edited by kevinm34232; 05-17-2018, 07:17 PM.

                                        Comment

                                        • budm
                                          Badcaps Legend
                                          • Feb 2010
                                          • 40746
                                          • USA

                                          #40
                                          Re: Sony KDL-46EX640 won't turn on, 5 blinks on standby light.

                                          Well at least you did try to trick the ERROR pin signal but still get the same 5-error code. I am not sure at this point if you have T-CON or main board problem.
                                          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

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