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Samsung PS443D490: BN44-00442B PSU Clicks

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    #1

    Samsung PS443D490: BN44-00442B PSU Clicks

    Got this TV, I want it for personal use. When it's plugged in, the relay keeps clicking and the red light flashes but thats it.

    I have replaced everything except tcon and psu. The other parts work as the guy who I bought those from confirmed he pulled them from a working tv (he's genuine) but I now feel it's the psu.

    PSU looks perfect and no cold solder joints. Any clue?

    Edit:

    Im not getting VS but I do get B15V.
    Last edited by speedypro; 05-23-2015, 07:25 AM.
    Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer
    Tags: None
    #2
    Re: Samsung PS443D490: BN44-00442B PSU Clicks

    really needs to be in the TV section. the guy might be genuine but the parts can still be bad. don't quite understand why you'd pull apart a working TV and sell the parts?



    I think you mean logic board , tcon is a LCD term.

    If the logic board has a slow led blink like once every 5 secs it's in protect.

    You could go for the mainboard isolated and try the test patterns from the logic but I think there's a chance you may bad sustains or buffers. I these are prone for xmain failure and that can also damage the ymain too.

    You could isolate the x & y , backprobe Vs as you turn on and see if it shows but these shutdown also with either removed

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      #3
      Re: Samsung PS443D490: BN44-00442B PSU Clicks

      Originally posted by tw2005 View Post
      really needs to be in the TV section. the guy might be genuine but the parts can still be bad. don't quite understand why you'd pull apart a working TV and sell the parts?



      I think you mean logic board , tcon is a LCD term.

      If the logic board has a slow led blink like once every 5 secs it's in protect.

      You could go for the mainboard isolated and try the test patterns from the logic but I think there's a chance you may bad sustains or buffers. I these are prone for xmain failure and that can also damage the ymain too.

      You could isolate the x & y , backprobe Vs as you turn on and see if it shows but these shutdown also with either removed
      Hi. He tested the boards before posting. All board I got from him works. But I do think its the psu as I have found only one moset to be short. And I only get B15v, no Va nor VS.
      Last edited by speedypro; 05-23-2015, 09:12 AM.
      Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

      Comment

        #4
        Re: Samsung PS443D490: BN44-00442B PSU Clicks

        Replace that mosfet and see if it works.
        Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

        My computer doubles as a space heater.

        Permanently Retired Systems:
        RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
        Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


        Kooky and Kool Systems
        - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
        - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
        - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
        - Main Workstation - Fully operational!

        sigpic

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          #5
          Re: Samsung PS443D490: BN44-00442B PSU Clicks

          better to change the power supply instead of fixing here is one for 15 quid

          http://www.saelectronics.co.uk/bn44-...50a2w-psu.html

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