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Dynex flat screen 40 in tv. Have apx 3 in redish band across bottom of screen. Whole screen is flashing white shadow.

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Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Posted on Dec 03, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 105 Answers

SOURCE: Shadow on Flat Screen TV

Projection TV correct? This may take some work but it is common for a spec of dust to settle onto the Mirror inside the TV, The back side of the TV screen or onto the Lens from which the Video image is projected. Some TVs have ports that allow you to access the inside of the TV from the side, others you must remove the screen.

This is not something to do every day or every week and it will not improve the picture. You only do this when you notice that it is dirty. Any more than that and you yourself will create a bigger problem. ONLY LIGHTLY DUST the screen. Soaps, water and windex will leave streaks, damage the screen and cause more trouble.

Projection TVs are the eqivalent of a big flashlight showing onto a wall. Put you hand in front of the light and you get a shadow.

Inside you TV there is a light (the TV picture) that bonces of a mirror attached to the inside of the back of the TV. The light reflects off the mirror onto the back of the screen. You view this refelected image from the front. Spiders commonly make webs inside the TV that appear in the picture. Dust Bunnies may get blown into an area and become stuck in the way. Sometimes a lite tap, shake or blow may remove this also.

Posted on May 21, 2009

  • 1779 Answers

SOURCE: Sharp aquos has green and white vertical lines

You must contact a svc co. This is a upper or lower buffer board problem and possibly a control board. Nothing you have done wrong, it just happened.

Posted on Feb 28, 2009

romsky79
  • 822 Answers

SOURCE: 3 horizontal lines across screen and triple shadow on left side

its a LCD connectors. re-connect it properly. some loose connection.

Posted on May 25, 2009

jrweighing
  • 183 Answers

SOURCE: 43'' SAMSONG FLAT SCREEN. SHADOWS RADOMLY APPEAR

Is your tv a plasma tv or an lcd tv? When you say shadow, do yo mean a band across or down the screen, or is it a patchy shadow?

Posted on Mar 17, 2010

  • 8457 Answers

SOURCE: No Picture-white screen

Ur Tuner board,that the tv signal came into that board.U have a little manchanical skill.Take ur tv aparts.Replaced that Tuner board ur tv will work again.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish Tuner board to replacement.

Posted on May 11, 2010

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Sharp LC-55LE643U - bottom 3/4 of my LCD TV is shadowed and purplish. How do I fix it?


Try a reset but unfortunately I believe it is a board cratered by the power outage. Try to get things shut down when the power goes

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Bottom of screen purple "haze"


Check the site linked below, and see the screen shots of defective LCD TVs, Surf it with patience. This should be a panel fault I assumes. http://electronicshelponline.blogspot.com/

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For several months we would get bands of lines across our screen. We thought we were experiencing some kind of outside interference as it would come and go. Two days ago the bands began to cover most of...


You're verical output IC is dead, this might because of a leaky capacitor on that section which causes the lines across the screen.
The processor shuts down the unit automatically to avoid further damage to your tube.

Send it to repair shop to isolate the problem. This is fixable.

Thanks for using fixya.

Jan 18, 2011 | Hitachi Televison & Video

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43'' SAMSONG FLAT SCREEN. SHADOWS RADOMLY APPEAR


Is your tv a plasma tv or an lcd tv? When you say shadow, do yo mean a band across or down the screen, or is it a patchy shadow?

Mar 17, 2010 | Televison & Video

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When you switch the tv on there are vertical white lines across the screen and shadowing aswell


Panel problem. Need to replace whole matrix as verical drivers have gone faulty

Feb 04, 2010 | Televison & Video

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TV worked fine one night, next day screen is white.


The LCD Panel failed. There is no easy fix but try to get the T-Con board to fix the issue. However, this part is usually only available with the whole LCD Panel. This is usually the most expensive part in the TV and the whole TV needs to be taken apart to replace the panel.

Might be economically viable if you can find a place that carrys the T-con but Dynex parts are usually hard to find. The LCD Panel part alone will exceed the cost of the TV.

Oct 07, 2009 | Dynex 32 in. LCD Flat-Panel HDTV

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3 horizontal lines across screen and triple shadow on left side


its a LCD connectors. re-connect it properly. some loose connection.

May 25, 2009 | Samsung LN-T4071F 40 in. LCD HDTV

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Philips big screen hd tv


TV repairs are generally much too expensive to undertake given the great prices out there for new ones with warranty.

I would not bother with it.

May 03, 2017 | Philips Televison & Video

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