vx2835wm, No power light, backlight flashes.

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  • esgeroth
    Member
    • May 2012
    • 18
    • United States

    #1

    vx2835wm, No power light, backlight flashes.

    I have a vx2835wm 28" viewsonic monitor that has been having some problems lately and is now no longer turning on. For several months it has had a problem turning on. I would press the power button and nothing would happen. The power light would not turn on. I would unplug the monitor and plug it back in and then it would turn on and operate without any issues. When this started happening I opened up the monitor and found a few bad caps on the motherboard, not the power supply. I replaced them but that made no difference. I let the problem go as I could still use the monitor.
    Last night I pressed the power button and the backlight started flashing with no image on the screen. Unplugging it and plugging it back in no longer works. There is no image on the screen. Not even the on screen display. The flashing is consistent and timed such that it reminds me of an electrical short. The flashing is a new problem that has not happened before.

    Here are some pictures of the boards. The pictures looked better when I took them from my phone last night. I will try to get some better ones tonight. If it might be helpful I can try to take a video of the flashing.
    Attached Files
    Last edited by esgeroth; 09-06-2013, 11:16 AM.
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: vx2835wm, No power light, backlight flashes.

    If you search the forum using HG281D which uses the same power supply board as the Viewsonic, you will get lots of info that you will have to read through, basically, replace the caps on the power supply board as a set, and also the two caps on the logic board if it uses the same logic board.
    https://www.badcaps.net/forum/search...archid=2973884
    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

    • esgeroth
      Member
      • May 2012
      • 18
      • United States

      #3
      Re: vx2835wm, No power light, backlight flashes.

      Thank you, I will be getting some capacitors for replacement. When considering esr rating, how low is "low"? Most of the kits I have seen seem to be incomplete and don't show what brand capacitors are included.
      Should I be selecting capacitors from a specific series?
      Are Jameco branded capacitors good? They don't really indicate who the actual manufacturer is.

      Comment

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