Question about ViewSonic N3251w 32 in. LCD HDTV

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Viewsonic n3251w not power on

Hi, the tv won't power on one morning. the red led will go green but nothing on the screen. plus there is a screaming sound when turn it on. what's the problem could it be? thanks so much in advance.

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  • Arnold Jin Jul 15, 2008

    It comes back again when I hold the power button for a while by accident. Sounds like it needs a reboot or something similar to my computer? It will shut down automatically sometimes after that and I just assume it does has some relations with Microsoft.



    Any suggestions? thanks.

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Do you have sound? If your have sound then the mains are working correctly but the High voltage to the screen is not. The screaming sound like the High voltage is shorted or at least drawing very excessive current. In either case the power supply for this unit is specific and made by JeanCo in Taiwan and good luck finding a supply. The LCD modules are made by CMO and they have an office in Califronia and might have a power supply.

Good luck!

Posted on Jul 13, 2008

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1 Answer

Won't turn on


Lots of power supply issues with Viewsonics. Out of warranty? Open up the back and have a look at the power supply if you know something about electronics, otherwise, call a repair shop.

Apr 23, 2010 | ViewSonic N3251w 32 in. LCD HDTV

1 Answer

I have a n3251 viewsonic and only the sound is working,


With the tv on some channel (and sound working), take a strong flashlight or other light and bring it up to the screen. Do you see a faint picture? Sounds like the backlight has failed. Could be the power supply for it or the inverter board or one of the lamps. Are you qualified to open the unit and look around? Do you have a voltmeter?

Mar 10, 2010 | ViewSonic N3251w 32 in. LCD HDTV

1 Answer

Phantom on/off


The defective power supply module will cause the following symptoms:
No Display and no Sound, Then Power indicate light changes from Green to Red.
Turns OFF by itself.
Needs to be unplug to make it work.
Works for a few minutes then turns OFF.
I repair these power supplies, if you need further assistance let me know where to contact you.

Aug 11, 2009 | ViewSonic N3251w 32 in. LCD HDTV

1 Answer

I was playing my xbox 360 on my viewsonic tv and it just went off


From the symptoms it sounds like the TV requires an Inverter PCB.

This is the part that "lights" the screen.

I hope this helps.

Mar 28, 2009 | ViewSonic N3251w 32 in. LCD HDTV

3 Answers

Remote control (UBRC-120) will not work the unit.


I had the same problem. resolved it by the following......
1. Press and hold the TV button until the red LED turns on and stays on.
2. enter 00000, the red LED will flash and turn off
3. test remote
This procedure should put the remote settings in default for TV.

if all goes well remote should operate the TV

Oct 05, 2008 | ViewSonic N3251w 32 in. LCD HDTV

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