problem with Sony KDL-40EX403

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  • Mikeyboy2007
    Badcaps Veteran
    • Mar 2013
    • 745
    • Scotland

    #1

    problem with Sony KDL-40EX403

    Hi guys i got a Sony KDL-40EX403 TV that has a fault.

    when you power on TV you get red led on front and when i press the power button the LED goes green, not wierd i know but tv doesnt have any backlight and doesnt display a picture as i shined a bright light on it to see if i was getting any display to which i was not, pressing menu and volume etc made no image on screen.. i tried googling the model number to see if anyone had any similar faults but had no luck at all..

    anyone else had an issue with this TV or had another tv with same problem ?
  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12098
    • U.S.

    #2
    Re: problem with Sony KDL-40EX403

    did you try a firmware update?, thats if you can find one on sonys inadequate web site.

    Comment

    • Mikeyboy2007
      Badcaps Veteran
      • Mar 2013
      • 745
      • Scotland

      #3
      Re: problem with Sony KDL-40EX403

      would it still take an update though even if theres no display ?

      Comment

      • Mikeyboy2007
        Badcaps Veteran
        • Mar 2013
        • 745
        • Scotland

        #4
        Re: problem with Sony KDL-40EX403

        step 3 after putting in USB is to follow on screen instructions but i wont see them ?

        Comment

        • nomoresonys
          Badcaps Legend
          • Jan 2013
          • 12098
          • U.S.

          #5
          Re: problem with Sony KDL-40EX403

          ok, my kdl-46s4100, updated when I powered set up, I just had steady green light, yours may be different.

          Comment

          • nomoresonys
            Badcaps Legend
            • Jan 2013
            • 12098
            • U.S.

            #6
            Re: problem with Sony KDL-40EX403

            unless there is nothing to do, just watch screen, not sure.

            Comment

            • nomoresonys
              Badcaps Legend
              • Jan 2013
              • 12098
              • U.S.

              #7
              Re: problem with Sony KDL-40EX403

              has anyone else updated this model?

              Comment

              • Mikeyboy2007
                Badcaps Veteran
                • Mar 2013
                • 745
                • Scotland

                #8
                Re: problem with Sony KDL-40EX403

                tried just plugging in USB with the update file, steady green light but no picture or backlight.. im just wondering why there is no display or no backlight could it be a mainboard issue ?

                Comment

                • nomoresonys
                  Badcaps Legend
                  • Jan 2013
                  • 12098
                  • U.S.

                  #9
                  Re: problem with Sony KDL-40EX403

                  try unplugging the bl-on plug from the main or power supply and see if the backlights pop on.

                  Comment

                  • nomoresonys
                    Badcaps Legend
                    • Jan 2013
                    • 12098
                    • U.S.

                    #10
                    Re: problem with Sony KDL-40EX403

                    Originally posted by Mikeyboy2007
                    tried just plugging in USB with the update file, steady green light but no picture or backlight.. im just wondering why there is no display or no backlight could it be a mainboard issue ?
                    the way my model update worked, is tv off, plug in usb drive, power on, light green goes double amber for about 2 minutes, when it stops blinking turn off tv, take out usb.

                    Comment

                    • Mikeyboy2007
                      Badcaps Veteran
                      • Mar 2013
                      • 745
                      • Scotland

                      #11
                      Re: problem with Sony KDL-40EX403

                      turned tv off plugged in USB and switched TV on and just green light nothing happened

                      Comment

                      • nomoresonys
                        Badcaps Legend
                        • Jan 2013
                        • 12098
                        • U.S.

                        #12
                        Re: problem with Sony KDL-40EX403

                        wrong post

                        Comment

                        • nomoresonys
                          Badcaps Legend
                          • Jan 2013
                          • 12098
                          • U.S.

                          #13
                          Re: problem with Sony KDL-40EX403

                          http://www.toms-service-manuals.com check there, put in sony and your model number, I'd check the training manual it's an 80% match.

                          Comment

                          • nomoresonys
                            Badcaps Legend
                            • Jan 2013
                            • 12098
                            • U.S.

                            #14
                            Re: problem with Sony KDL-40EX403

                            did you try my suggestion in post#9?

                            Comment

                            • nomoresonys
                              Badcaps Legend
                              • Jan 2013
                              • 12098
                              • U.S.

                              #15
                              Re: problem with Sony KDL-40EX403

                              manual says check your 3.3v and 12v, on power supply, see if they are correct.

                              Comment

                              • danielnaidoo2014
                                New Member
                                • Jan 2014
                                • 2
                                • south africa

                                #16
                                Re: problem with Sony KDL-40EX403

                                Hi i have a sony lcd tv model kdl46ex500 need some help

                                Comment

                                • freakaftr8
                                  Badcaps Legend
                                  • Oct 2012
                                  • 3743
                                  • USA

                                  #17
                                  Re: problem with Sony KDL-40EX403

                                  Hello for this issue you are having you should really start a new thread and tell what your symptoms are. Does it power on? Any backlights?

                                  Originally posted by danielnaidoo2014
                                  Hi i have a sony
                                  lcd tv model kdl46ex500 need some help
                                  Did I leave the soldering iron on?

                                  Comment

                                  • Mikeyboy2007
                                    Badcaps Veteran
                                    • Mar 2013
                                    • 745
                                    • Scotland

                                    #18
                                    Re: problem with Sony KDL-40EX403

                                    Originally posted by nomoresonys
                                    did you try my suggestion in post#9?
                                    ok I know this thread is a little out of date but I received another one of these with the same issue and would like to resolve it this time around. I cut the wire for BL_ON and switched tv on, made no difference.

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #19
                                      Re: problem with Sony KDL-40EX403

                                      Can we see the pictures of the whole backside of the TV so we can see all the boards?
                                      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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