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Sony KDL-46EX700

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    #1

    Sony KDL-46EX700

    Hello all, yes I am new here and appreciate any assistance in troubleshooting this TV. Picked it up from my son last night, turn it on and all you get is the blinking red 6 times light.

    I have begun looking at the Sony Troubleshooting manual that I found in a post here. Initially one would think that its the backlight but in the the troubleshooting guide page 16, it states that (6X blinking) is caused by a failure of the converter circuit. Replacement of the power supply board is necessary.

    The flowchart on page 17 indicates that it would be the GE2B board.

    So as a novice, I am sure that Sony's have known issues and regular cut to the chase malfunctions. So I am seeking any guidance into leading me to the issue with this TV. I have yet to open it and look for any obvious issues on the board, so any help would be appreciated.

    Thanks,

    ed
    Tags: None
    #2
    Re: Sony KDL-46EX700

    So here is exactly what it does. Tv turns on, Sony logo appears then disappears. Starts again, Sony logo appears, then disappears for the second time and TV then blinks 6 red lights.

    Comment

      #3
      Re: Sony KDL-46EX700

      Try a simple reset, unplug tv for 5 minutes, press and hold the power button on tv for 30 seconds, plug tv back in and try it, probably won't fix but easy enough to try, could be bad backlight/s or backlight driver. There's a few things to try there: https://automatelife.net/sony-tv-red...nking-6-times/

      Comment

        #4
        Re: Sony KDL-46EX700

        Originally posted by nomoresonys View Post
        Try a simple reset, unplug tv for 5 minutes, press and hold the power button on tv for 30 seconds, plug tv back in and try it, probably won't fix but easy enough to try, could be bad backlight/s or backlight driver. There's a few things to try there: https://automatelife.net/sony-tv-red...nking-6-times/

        Thanks for your response, that was the first thing he tried. Will look at the info in the link you provided.

        Comment

          #5
          Re: Sony KDL-46EX700

          bad leds

          Comment

            #6
            Re: Sony KDL-46EX700

            Code error "6".
            Attached Files

            Comment

              #7
              Re: Sony KDL-46EX700

              OK so 4 new led strips is what I am hearing you guys say.

              Comment

                #8
                Re: Sony KDL-46EX700

                SO I am this stage, can some one point me to further tear down to get to the LEDs?

                Attached Files

                Comment

                  #9
                  Re: Sony KDL-46EX700

                  I always check all the resistors, diodes and transistors at least on top of the powerboard before tearing down, might not be your case but i have seen one resistor cause the shut down and 6 blink error, here's a guy doing your model, maybe be a little more careful with the panel than he is being tho, it's definitely not the best how to video, maybe you can find a better one, searching on youtube can be a pain: https://www.youtube.com/watch?v=I2WIbl7sm_I

                  Comment

                    #10
                    Re: Sony KDL-46EX700

                    Originally posted by nomoresonys View Post
                    I always check all the resistors, diodes and transistors at least on top of the powerboard before tearing down, might not be your case but i have seen one resistor cause the shut down and 6 blink error, here's a guy doing your model, maybe be a little more careful with the panel than he is being tho, it's definitely not the best how to video, maybe you can find a better one, searching on youtube can be a pain: https://www.youtube.com/watch?v=I2WIbl7sm_I
                    Thanks

                    Comment

                      #11
                      Re: Sony KDL-46EX700

                      So after replacing the 4 LED's, this is what I have now, comes on show this and goes blank. 6 blinks red light

                      Last edited by digitalshooter; 10-11-2023, 11:34 AM. Reason: picture not showing

                      Comment

                        #12
                        Re: Sony KDL-46EX700

                        are you sure now 6 blinks and not 5?

                        Comment

                          #13
                          Re: Sony KDL-46EX700

                          Originally posted by Davi.p View Post
                          are you sure now 6 blinks and not 5?
                          Yes, Sony appears behind this half screen and goes away.

                          Comment

                            #14
                            Re: Sony KDL-46EX700

                            SO I had a bad flex cable connection. The screen is normal again, but TV still turns on then quickly off. I am seeing some kits on ebay that have transistors and resistor that claim should fix this kind of issue. Or I can buy a used power board with 30 day warranty shipped for less than 50.00 bucks.

                            Thoughts?

                            Comment

                              #15
                              Re: Sony KDL-46EX700

                              A couple simple things to try, look over the solder joints on the powerboard and reflow any that look suspicious, look up images of bad solder joints if needed. Heat up the electrolytic capacitors with a hairdryer for a couple minutes, probably try this first, use hairdryer NOT heatgun, then try tv, don't wait til it cools down, see if it stays on longer or there is a difference, it's a test that can sometimes sniff out marginal/bad caps.
                              Last edited by nomoresonys; 10-14-2023, 03:25 AM.

                              Comment

                                #16
                                Re: Sony KDL-46EX700

                                You have replaced single leds and this is the reeason, needs a certain technique to find half damaged leds, i suggest you to remove the return wire for the leds and put an 1n4007 diode in series..

                                Comment

                                  #17
                                  Re: Sony KDL-46EX700

                                  Originally posted by nomoresonys View Post
                                  A couple simple things to try, look over the solder joints on the powerboard and reflow any that look suspicious, look up images of bad solder joints if needed. Heat up the electrolytic capacitors with a hairdryer for a couple minutes, probably try this first, use hairdryer NOT heatgun, then try tv, don't wait til it cools down, see if it stays on longer or there is a difference, it's a test that can sometimes sniff out marginal/bad caps.
                                  Will try this today, thanks!

                                  Comment

                                    #18
                                    Re: Sony KDL-46EX700

                                    Originally posted by Davi.p View Post
                                    You have replaced single leds and this is the reeason, needs a certain technique to find half damaged leds, i suggest you to remove the return wire for the leds and put an 1n4007 diode in series..
                                    Not sure I follow what you are saying but for clarification on my end all 4 complete strips have been replaced. Also, in the meantime after acquiring an LED tester, I have checked the original 4 strips that I removed, and the all power on completely.

                                    SO is this telling me that my efforts to replace the leds strips, were wrong to begin with?

                                    Comment

                                      #19
                                      Re: Sony KDL-46EX700

                                      Warmed the board, no change. Turn power switch to ECO, hear relay click, push power button: Green light comes on, Sony logo briefly appears and goes away. Cycles once again, then red light on front comes on, then blinks 6 times.

                                      Comment

                                        #20
                                        Re: Sony KDL-46EX700

                                        this is what you told:
                                        So after replacing the 4 LED's
                                        and so i answered..
                                        the persistance of 6 blinks is either bad strips or bad backlight circuit, but i guess is the first, so why don't try the same my advice?

                                        Comment

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