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No picture with white lines have sound - Toshiba 32AV502R LCD TV

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White fuzzy thin vertical lines appear on screen. The picture is fine, but the lines are in front of it. Is this something than can be repaired?


Hello can you post a picture of your tv set with the fuzzy white lines thank you so I can give you the best sound advice.

Aug 19, 2014 | Sylvania Televison & Video

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White Raster with thin lines; Sound Ok.


White raster with retrace lines: No picture, Sound OK
(picture tube based telivisions.)

It is a common fault to occur in most of the CRT based telvisions, regardless of which brand it is. There will be sound OK, and a bright screen with thin white horizontal lines across; at about an inch space, all over the screen area. This fault may occur along with colur shades also, like blue screen with white retrace line, red screen with white retrace lines, green screen with white retrace lines. Let us take the first case. A white raster with white thin retrace line acorss the screen. These are call vertcial retrace lines technically. To make it mor understand, we have to go to some picture tube electrode details. There are three colour cathodes for a colour picture tube, Red, Blue and Green. Two girds are there called Focus and Screen. Focus grid is supplied with focus voltage which in turn determine the cocus of picture, and screen grid is supplied with screen volrage which determine the emission of the picture tube; in short. There is a final anode to all the picture tubes, which supplied with Extra High Tension voltage, can be located at the top side of the picture tube, to which the EHT voltage from LOT is connected with the help of rubber ****** and clip. Without these three voltages, EHT, Screen and Fcous, no raster will be produced. Therefore in our case, there is a raster, so, horizontal output section including Line Output Transformer [LOT] is functioning well, and as far as sound is there, tuner and video IF section are working well. In fact, all other section except, video output section is working properly.
There are three cathode points on the base card, marked as Bk, Rk and Gk. Check the voltages of these three cathodes. In our case, it will be very low or approximately equal to zero. When cathode voltages goes low, emission of the CRT increases, is the reason. There must be a voltage between 120 and 135VDC at these points. Find out the reason for this voltage drop is the next step. The video drive voltages in most TVs comes from LOT windings, after rectification and filtering. There will be one reisitor of low value, say one Ohms or so, will be connected series with this winding, in between diode and winding. Check the voltage at the cathode of this rectifier diode first. If found low replace the diode and the smoothin capcitor. The smoothing capacitor will be between 33 and 47MFD 250VDC rating. Replace both of them. If there is volatge, say 200VDC or so, check whether this voltage comes to the CRT base board or not, If not, check the conducting wire, serial resistors; if used for open. There is no chance of transistor shortage at this time as the raster we see is white. If raser we see have a specific colour predominent, that is green, blue or red, check the revalent video out transistors and replace it. It is best to replace all the three video output transisors at the same time with same batch and number.

on Apr 18, 2011 | Televison & Video

1 Answer

Powers up - white picture with lines and no sound


Sounds like a min board fault. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/

Feb 14, 2014 | RCA L26HD35D TV

1 Answer

Vizio M420kd vertical thin white line on left of screen pictures have lots of green ghosting


If you've ruled out that the source you're displaying from is good, I would contact vizio for a warranty repair

Jan 24, 2014 | Vizio Televison & Video

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Black and white picture with red lines vibrating with sound.


More info would be nice. Are you using HDMI or Component cables. If it is component cables (red, blue, green for video white and red for audio) Check your red and blue connection. Green alone will give you a black and white picture.
If you are using an HDMI cable, replace the cable to see if this changes anything or if you have another tv swap cables to see if problem stays with tv or moves to another tv.

Feb 08, 2013 | Hitachi 46F500 46" Rear Projection...

1 Answer

White lines on the screen.sounds ok.picture is coming behind white line.


Lines means Screen Drive is overdriving, try adjusting the Screen control on the FBT flyback Transfomer, adjust it down. If that does not Clear out Problem then replace the CRT Board that is connected to Picture Tube.

Jan 22, 2011 | Sony FD Trinitron WEGA KV-27FS100 27" TV

1 Answer

My tv quit with no picture or sound and only a white line


It's more than likely that the white line is from left to right, is that the case?

Apr 16, 2010 | Proton MM2701VT 27" TV

1 Answer

Picture has white horizonal line accross it


You have a vertical collapse. Not sure if its worth fixing because i don't know what type of set it is or how old. But vertical is not usually expensive to fix. Possibly just replace vertical ic

Apr 22, 2009 | Televison & Video

1 Answer

Nopicture


No vertical deflection. Vertical output IC, caps.

Nov 25, 2007 | Televison & Video

1 Answer

White line across image


sounds like capacitor problems or a possible ccd problem or driver problem .Its time to send in the unit for an estiamate. Cont # is 1-800-NIKON-UX , 1-800-NIKON-US Good Luck

May 11, 2006 | Nikon Coolpix 5700 Digital Camera

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