Question about ViewSonic VX900 19" LCD Monitor

3 Answers

Blown Fuse Value


It appear my inverter board on my Viewsonice VX900 blew a fuse (F2 is th ref des). Is there a way to figure out what value it is?

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  • bpislife Dec 04, 2007

    The inverter board is the DAC-12C024. This is a Delta inverter board Rev A0

  • stuwert Dec 26, 2007

    same fault on mine. i shorted out the fuse, works fine now.

    Anyone know the value of f2?


  • bpislife Jan 10, 2008

    So here is the deal. The ref Des F2 means that it is in fact a fuse, and chances are since the number next to the F is 2 that means that there is a good chance there is an F1. As it turns out, the inverterboard in this monitor has to identical backlight circuits. One powers the backlight at the top of the screen and one at the bottom. The bottom circuit had the F1 fuse. As it turns out the fuse was fine and I could clearly read the letter N on top of the fuse. As it turns out, the fuse was made by littelfuse and the N indicates that the fuse is a 2A, 63V fuse. I purchased a bunch from digi-key and it works like a charm. I would NOT recommend shorting the pads that the fuse was once connected to, together. The fuse could have popped for a reason, and shorting the fuse could cause other components to fail.

    Again F2 is a Ref Des not a value. The value of the fuse is written on it. If it is anything like my monitor, there were two fuses for the two circuits and it had the Value N.

    N is a fuse made by littelfuse in a 1206 package. It is a 2A, 63V fuse. You can order it from places like

  • bpislife Feb 16, 2008

    Sure is F1457CT-ND. I find using digi-key's online site is much easier than trying to use their catalog.

  • claron May 02, 2008

    I have this same issue with a Viewsonic VP201b. I checked the same fuse as in the VX900 and it seems to be bad. The fuse is also labeled F2, however the one in the VP201b says FN on top of it. Does anyone know the value or part number for this?

  • e-fix May 19, 2008

    I had the same problem on my VX900. Replaced F2 and it works fine now. I have spare fuses (FN = 2A 63V) if anyone is interested I can send some for $5.

  • rarcompany Jan 11, 2009

    I had the same problem with my VX900. Removed the backlight inverter and then read on-line comments about fuses. How can I tell if it is the whole board or fuses? Thanks!



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The top left inset photo shows the two fuses circled, F2 on the left.

Posted on Jun 18, 2008

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Bpislife, do you happen to have the digi-key part number for the fuse? I downloaded their catalog but it's a bit daunting for people not well-versed in electronics.

Posted on Feb 15, 2008

  • ZemU Feb 17, 2008

    bpislife, thanks for the reference number. Gosh, those fuses are SOO small. I tried checking continuity across F1 and F2 with an ohmmeter; sometimes I get continuity, sometimes not, depending on exactly where I wiggle the probes around. In any event, I don't think I would be able to change the fuse even if I were sure that was the problem. I've never done surface-soldering before, and especially on parts so small. Are you an electronics technician?
    I'm still not even sure that the inverter is the problem with my monitor and not the CCFLs. I hate to spend money replacing the inverter if that might not even fix it.



Where is F2 located?

Posted on Jan 10, 2008

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