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LA52A610A red standby light constant, clicking on and off

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    #1

    LA52A610A red standby light constant, clicking on and off

    LA52A610A (LA52A610A3F)

    Wont turn on, red standby light constantly on, clicking on and off relentlessly (2 sec on, 2 sec off)

    Power supply voltages are all there during the ON phase of the clicking cycle. I know the power supply is working because I have a working a650 which use identical power supply. See below solved thread.

    https://www.badcaps.net/forum/showthread.php?t=70831

    So that narrows it down to the mainboard. The a610 mainboard also looks the same as the a650 as shown, although couldn't find any shorts like i did on the a650. Could this be a bricked EEPROM issue that's causing constant standby light? And would anybody know where the EEPROM is?

    Note : i tried changing the capacitors on the mainboard already as you can see. Also the LA and LN lineup use different boards.
    Attached Files
    Last edited by syaoran123; 07-22-2018, 10:24 AM.
    Tags: None
    #2
    Re: LA52A610A red standby light constant, clicking on and off

    Please help if somebody knows!

    I located two 8 pin ics that could possibly be the eeproms. One of them reads S24CS0 and the other reads ATMLH834. When I replaced both of them with new eeprom chips, I get the same thing. Still solid red standby light and clicking on and off, no picture, no backlight. The mainboard is very hard to find, so i need to repair it rather than replace.
    Attached Files
    Last edited by syaoran123; 07-26-2018, 11:22 AM.

    Comment

      #3
      Re: LA52A610A red standby light constant, clicking on and off

      Originally posted by syaoran123 View Post
      Please help if somebody knows!

      I located two 8 pin ics that could possibly be the eeproms. One of them reads S24CS0 and the other reads ATMLH834. When I replaced both of them with new eeprom chips, I get the same thing. Still solid red standby light and clicking on and off, no picture, no backlight. The mainboard is very hard to find, so i need to repair it rather than replace.
      If they were both EEPROMS did you reprogram them first?
      Willing to help but I'm no expert.

      Comment

        #4
        Re: LA52A610A red standby light constant, clicking on and off

        No, they were not preprogrammed. I soldered in a new blank EEPROM.

        Are you saying these have to be pre-programmed, and not automatically written on start up? Are the above symptoms characteristic of a faulty EEPROM?

        Cheers

        Comment

          #5
          Re: LA52A610A red standby light constant, clicking on and off

          For your set I do not know. Some models will reprogram their own EEPROM but I don't believe that this is the case in all models.
          https://wiki.samygo.tv/index.php/UnB...Reset#LAxxC650
          Last edited by dick_barton; 07-28-2018, 08:49 AM.
          Willing to help but I'm no expert.

          Comment

            #6
            Re: LA52A610A red standby light constant, clicking on and off

            So I tried replacing my A610A board with the A650A board from another working TV. The tv now works normally EXCEPT the standby light flashes repetitively while the TV is ON. The red light should turn off when the TV is on, well that's how it behaves on the normal working TV. It responds to remote commands though.

            Will try transferring the standby light and remote receiver module across to see if it stops the blinking.

            Comment

              #7
              Re: LA52A610A red standby light constant, clicking on and off

              FYI: I entered the service menu>option and changed the model option to another one. This solved the flashing standby light issue.

              Comment

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