Mag Lt916s

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  • IRShifty
    Senior Member
    • May 2009
    • 78

    #1

    Mag Lt916s

    This monitor is not powering on at all. I pulled out the power supply board and replaced 4 swollen caps. All caps are stock Samxon and were replaced with Nichicons from digikey. I replaced 2 220uf 25v and 2 470uf 25v. I am wondering if i should replace the other 6 Samxon caps even though they look visually good? Or is their another known problem with this model not powering on for some other reason?
  • EGuevarae
    Badcaps Legend
    • Nov 2008
    • 1336
    • USA

    #2
    Re: Mag Lt916s

    Originally posted by IRShifty
    This monitor is not powering on at all. I pulled out the power supply board and replaced 4 swollen caps. All caps are stock Samxon and were replaced with Nichicons from digikey. I replaced 2 220uf 25v and 2 470uf 25v. I am wondering if i should replace the other 6 Samxon caps even though they look visually good? Or is their another known problem with this model not powering on for some other reason?
    You are already there. Change them all. Just repaired a dead Westinghouse 19" with all good looking Samxons inside, and yet it was dead.
    There are 10 kind of people in this world: those that understand binary, and those who don't.
    • ASUS ROG Maximus IX Code
    • Intel Core i5-7600K 3.8GHz
    • 16gb GSKILL TridentZ RGB DDR4-3200
    • 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
    • Windows 10 Pro x64
    • GeForce GT1050
      2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job )

    Comment

    • EGuevarae
      Badcaps Legend
      • Nov 2008
      • 1336
      • USA

      #3
      Re: Mag Lt916s

      Originally posted by IRShifty
      This monitor is not powering on at all. I pulled out the power supply board and replaced 4 swollen caps. All caps are stock Samxon and were replaced with Nichicons from digikey. I replaced 2 220uf 25v and 2 470uf 25v. I am wondering if i should replace the other 6 Samxon caps even though they look visually good? Or is their another known problem with this model not powering on for some other reason?
      Did you check the main fuse on the AC input? Or the other two that are present, one for the 5v output to VBoard and the other for the inverter?
      See the attached picture:



      If there's no 5V for the main logic board, the monitor would be dead.
      Attached Files
      There are 10 kind of people in this world: those that understand binary, and those who don't.
      • ASUS ROG Maximus IX Code
      • Intel Core i5-7600K 3.8GHz
      • 16gb GSKILL TridentZ RGB DDR4-3200
      • 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
      • Windows 10 Pro x64
      • GeForce GT1050
        2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job )

      Comment

      • IRShifty
        Senior Member
        • May 2009
        • 78

        #4
        Re: Mag Lt916s

        Replaced all capacitors, checked main fuses, i have a different board then you posted but I did check some of the fuses and all the ones I tested passed fine, except the round one that is circled in the picture.

        Also: there seems to be no power going to the main board so a fuse sounds likely.
        Attached Files

        Comment

        • Nama
          Senior Member
          • May 2009
          • 127

          #5
          Re: Mag Lt916s

          Why did you not check the main fuse?.
          That would be the first one I would check before ever looking at the caps.

          If you have a voltage multimeter put it on OHM setting and check that fuse for continuity.

          Or use a bread tie or something similar to jumper that main fuse. tab to tab. See if you get power.

          Be carefull your getting a full 110v at that fuse.

          Sorry if I am telling you things you already know. I am no pro.
          Jacob
          ^Learning to walk on rice paper without leaving a trace,

          Comment

          • EGuevarae
            Badcaps Legend
            • Nov 2008
            • 1336
            • USA

            #6
            Re: Mag Lt916s

            Originally posted by Nama
            Why did you not check the main fuse?.
            That would be the first one I would check before ever looking at the caps
            That's what I suggested in post #3. No AC input = NO DC output

            Originally posted by IRShifty
            except the round one that is circled in the picture.
            That's the Main AC input fuse
            There are 10 kind of people in this world: those that understand binary, and those who don't.
            • ASUS ROG Maximus IX Code
            • Intel Core i5-7600K 3.8GHz
            • 16gb GSKILL TridentZ RGB DDR4-3200
            • 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
            • Windows 10 Pro x64
            • GeForce GT1050
              2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job )

            Comment

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