Question about ViewSonic N3252WS 32 in. LCD TV

1 Answer

No picture, sound works, but along with high-pitched noise

ViewSonic 32" N3252w - no picture, sound OK, but accompanies by a high-pictched screeching noise. What's the problem and how do i fix?

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  • ivanovajulia Apr 21, 2009

    source is cable box. i only have 1 additional cable plugged in (in addtion to the cable box cable), a tri-colored cable, yellow, red, white (i think), plugged into either the cable box or dvd player. I tried unplugging everything and leaving it unplugged all day, but it didn't help.



    from this website, this seems to be a common issue with this model of ViewSonic, but i'm unclear on what the fix is.

  • ivanovajulia Apr 21, 2009

    thanks for the suggestion.



    this issue creeped up gradually. the TV was working fine for a long time, and recently, it would start to black out only on the left side. Then, the picture would go out entirely, the screen turning black for a few minutes, and then it would return. Next, the picture would go out, i would turn the TV off and on again, and the picture would return. Now it's at the point where there's no picture whatsoever. Maybe this adds to the description.



    thanks,

    julia

  • Paul Gallas
    Paul Gallas May 11, 2010

    What is plugged into the back? What source is being used (tv tuner, dvd, vcr, etc)

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My guess is that you might have the yellow (video) cable plugged into an audio input on the TV. Make sure that the yellow cable is plugged into both the video out on the DVD player and the video in on the TV. Most of these connections are color coded.

As a diagnosis, try changing the TV input (using the remote) and let me know if you still get the buzzing on the other inputs. If no, then, it's most likely your RCA connections. If yes, it's another problem.

Posted on Apr 21, 2009

  • Paul Gallas
    Paul Gallas May 04, 2009

    This sounds like a bad power supply (transformer). The power supply is unable to provide enough power to accommodate a full picture. When the TV is turned off, and on, a jolt of power provides a picture, but then the same problem occurs. The buzzing is also a symptom of a bad power supply. Unfortunately, my technical expertise is not with repairing, only diagnosing. At least you'll have some idea of what is wrong when talking to the repair guy.

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This model has a history of power supply problems. Depending on your level of expertise on electronic repair, you can repair the power supply or replace it. The most common repair is to replace the bulging power supply capacitors.

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Are you going to DIY repair and have all the tools needed?
See my pictures here:
http://s807.photobucket.com/albums/yy352/budm/VIEWSONIC/Viewsonic%20N3252W/

You need to check the fuse and caps in the power supply and at the inverter board.

Please read more here:
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: www.interliquidparts.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

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Inspect the power supply module for any bad caps with domed tops first.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20N3250W/

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

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http://www.youtube.com/watch?v=9Q6_TgNJvQw

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