Sony KDL-65W850C is this a Mainboard issue ??

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • mmartell
    Badcaps Legend
    • Oct 2013
    • 3189
    • Canada
    #1

    Sony KDL-65W850C is this a Mainboard issue ??

    This sat around for quite some time after the backlights died with the six blink error code. I bought replacement strips and eventually swapped them in.

    Backlights appear to be working fine now. However the tv only powers on with the "Sony" logo for about two seconds after which it goes away and the panel with backlights stay powered for about twenty more seconds then it shuts off. Tv can only be powered again after power cycling at the outlet.

    It will not program via usb, the stick flashes but there is never any indication that it has entered programming mode at least that I can tell.

    Is this a hallmark of a bad mainboard for this series ? If so is it the cpu or emmc that goes bad ?

    I see there are repair services for this board but they are relatively expensive for an older 1080p set in my opinion. Especially if I can't be certain the board is at fault and the symptoms I've read about failed mainboards don't entirely match what I'm seeing...

    Any guidance is appreciated.
    Tags: None
    • Davi.p
      Hobbist Tech
      • Sep 2009
      • 4302
      • Italy - Milan
      #2
      Re: Sony KDL-65W850C is this a Mainboard issue ??

      1080p? It doesn't matter, it exists 4k tv with poor quality colors, and also 4k contents are not so commo.. it is clearly a memory fault, probably a spike hit the device and damaged BL + some files when them was in write state..

        Comment

        • mmartell
          Badcaps Legend
          • Oct 2013
          • 3189
          • Canada
          #3
          Re: Sony KDL-65W850C is this a Mainboard issue ??

          This is hardly a high end television but no matter...

          Are the repair service people replacing and reprogramming the emmc then ?

            Comment

            • Davi.p
              Hobbist Tech
              • Sep 2009
              • 4302
              • Italy - Milan
              #4
              Re: Sony KDL-65W850C is this a Mainboard issue ??

              i don't know what they do, some people think they must change chip some others think they don't..
              i think emmc is ok

                Comment

                • mmartell
                  Badcaps Legend
                  • Oct 2013
                  • 3189
                  • Canada
                  #5
                  I tried pairing mode though it's already paired. It failed but the symptoms changed. It now has the classic boot loop failure after reaching the Android spinning circles.

                  After some deeper investigation it seems these do in fact suffer from bad/failing emmc chips. I'll probably send the board in for repair since having just installed the leds I should be reasonably certain the set will last a little while more before any problems arise.

                    Comment

                    Previous template Next

                    Related Topics

                    Collapse
                    • max789
                      Samsung UE48H6410 replaced Mainboard but backlights doesnt go on
                      by max789
                      Hello, I have a problem with my Samsung UE48H6410SSXZG with the main board BN41-02156A and the power board BN44-00709A. Everything seemed like this, the TV could no longer be switched on, the standby LED always flashed 5x2 times. Backlight was off and no sound from TV. Also made the flashlight test and there was no picture.

                      I made the following tests:
                      1. Disconnected the main board from Power Board = backlight works.
                      2. Connected the main board and disconnected the T-Con = backlights does not work.

                      So I ordered a main board from Ebay also BN41-02156A but from...
                      01-18-2024, 06:56 AM
                    • eclectric
                      Sony Bravia KDL-70W850B T-CON board / software update issue
                      by eclectric
                      Hi, I'm hoping someone can help me with this issue before I give up on this TV.

                      In short, I replaced the T-CON board due to an error code indicating that was the problem, after which it flashed a green and orange LED meaning software update required. I cannot get the tv to do the required update via USB, so I am stuck.

                      Here is a rundown of the symptoms and the steps I have taken to troubleshoot:

                      I inherited the TV with the symptom that it would turn on, then turn off after 5-10 seconds and a red LED flashed 4 or 5 times. Sometimes it would be 4, sometimes...
                      05-23-2022, 01:25 AM
                    • Akuanka
                      Sony SLV-E780 Power Supply Issue – Clicking Sound, Need Help Identifying Faulty Component
                      by Akuanka
                      Hi everyone,

                      I'm troubleshooting a power supply issue with a Sony SLV-E780 VCR. The device clicks repeatedly but doesn't power up completely. I've already replaced five capacitors, but the problem persists.

                      Here's a video link https://photos.app.goo.gl/3Xki6yvCLn67gLX78​ showcasing the sound. Based on your experience, could this be due to a transformer, diode, or another component? Any guidance on what to test or replace next would be greatly appreciated.

                      Thanks in advance for your help!
                      11-23-2024, 01:12 PM
                    • GraphicMan
                      sony sdm-p234 very rare issue never seen before
                      by GraphicMan
                      The monitor is old yes but occasionally used (perhaps about 1 ~2 hours usage per day on average)
                      one time i turned the pc on and noticed this issue
                      what could it be?
                      nothing wrong is seen when it is off, also the issue is not there on a green screen!
                      when watching movies it is hard to detect unless in black screen/large shadows
                      please check the images, thanks...
                      04-14-2024, 10:06 AM
                    • alltvrepairs
                      Samsung HG49EE690 Hospitality TV reboot issue Mainboard BN94-11086A
                      by alltvrepairs
                      Hi,

                      I have 3 of these TVs for repair with same problem of going to standby after around 10minutes and start again continuously. I have tried a new SPI 25Q40 but fault remains. Am suspecting a CPU problem as it gets a bit hotter than I expect.
                      This seems to be a common problem in these models. I am 100% sure it is a mainboard issue as I have fitted a spare from a normal TV from a UE40K5607 and stays on (diplay inverted but I managed to rotate in SM using a different display).


                      Any help appreciated!...
                      03-14-2024, 03:39 AM
                    • Loading...
                    • No more items.
                    Working...