Question about ViewSonic VX900 19" Flat Panel LCD Monitor

1 Answer

I recently just picked up a viewsonic vx900. I was told there was a blown fuse and the monitor will not power up. I opened the back and tested all the fuses I can find. They appear to be working fine. I unplugged different circuit boards and nothing changed. I tried different power cords and still nothing. Does anybody know what is wrong here? Any advice will help.

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  • Matt
    Matt Sep 12, 2010

    I just did some further investigation and it doesn't look like the power supply is putting out any power. It is receiving but not putting out. Is the monitor really worth keeping?

  • Matt
    Matt Sep 14, 2010

    Alright, thanks for letting me know.

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  • Master
  • 11,361 Answers

Are you getting the 12vdc from the power supply? Fuse on the inverter board good?
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX900/

It will be hard to tget the power supply module sch because it is made by OEM not by Viewsonic.

Posted on Sep 13, 2010

  • Matt
    Matt Sep 13, 2010

    The fuse on the inverter is good. I also found two other fuses: one in the power supply and the other next to the power cable from the power supply to the main circuit board. These fuses are also fine.

  • Bud Martin
    Bud Martin Sep 13, 2010

    19" is probably not worth it since you will not know what else is wrong until you get the power supply running. If you have a spare 12vdc 5A regulate power supply wall wart laying around you can hook it up to where the bad 12vdc power supply is connected to to see if it will work, I did that on my test unit.

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http://s807.photobucket.com/albums/yy352/budm/PICO%20fuse%20by%20Littlefuse/

http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX900/
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