Question about Philips PR0935B Television

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Green screen&no picture only sound

L put tv on it works ok then after fifteen min the screen gose green with white lines no picture but has sound

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Check the crt socket could be a bad solder

Posted on Dec 13, 2006

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Posted on Jan 02, 2017

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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

It sometimes makes a static nose and the picture is dark i have tried messing with the color and back light settings and it doesn't do much


Samsung LCD TV with no video and high pitched sound - Digital TV ...

www.tomsguide.com/forum/54120-4-samsung-video-high-pitched-sound

Jan 7, 2010 - 26 posts - ‎15 authors
Hi, I have a Samsung LN40A550 LCD TV which I have had for just over a year. ... I was watching TV yesterday and all of a sudden the picture went all. ... started makinga very high pitched buzzing sound with no picuture coming on. We did have a bunch of green vertical lines, but now just a black screen.

Samsung LCD Green Screen - Forums - CNET

www.cnet.com > Forums > Samsung

CNETJun 11, 2015 - TV hooked up to basic cable and getting green screen picture. ... I was getting green static in the dark areas and green fuzz down the left hand ... where can you find the white ribbion, i have a lg rt-32lz50. it works sometimes, but i goes green. Samsung LCD TV screen went black (audio on, no picture)
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Feb 03, 2016 | Samsung Ln40e550 40 1080p Lcd Tv ln40e550

1 Answer

VIZIO 42 CLASS RAZOR LED SMART TV M420KD picture has lots of green ghosting and thin white vertical line through left side of screen also


Hi Charlene,

please try with video input from any device,and i think you are using local antenna and it has gain problem or your tuner section of the tv is not working correctly.
if distroted pictures comes with video input signal it is video amp and processing unit problem.
you have to go for repair shop for fix that.
regards,
nuwan

Jan 24, 2014 | Vizio Televison & Video

1 Answer

Sanyo dp26648 has sound, but has vertical lines w/picture popping in periodically.


change your device cables or try to put at a pc to check if isworking your pc

Dec 15, 2013 | Sanyo DP26648-R 26 in. LCD TV

1 Answer

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

Evenly spaced vertical lines


Hello
Check the smoothing capacitor to video output supply voltage, usually derived from any one winding of the LOT. It will come around 10uF350VDC to 47uF 350VDC range. If this capacitor is faulty, or gone less in capacitance with time, this type of fault will occur. Check the green volour output transistor on the video output card, can be located attached to the neck of the picture tube; for any loose soldering or leakage. OK.

Oct 19, 2011 | JVC AV-32P903 32" TV

1 Answer

Screen turn green tv is 57 rear projection


Good Day,
It appears that you may have a green drive issue. Try adjusting the Sreen Control it is located in the front of TV.
1) Remove Speaker Grill (it just pulls off) start at one end, 2) Remove cover (5-6 screws), 3) Adjust control. The control is located on lower right side towards bottom. A small black device with 2 rolls of controls, adjust the center control on bottom row counter clock wise, until you get a black and white picture.(adjust with color control to min).
If this does not work you light bulb (CRT) is bad about a $750.00 repair.

Good Luck, Big Irish.

Dec 07, 2009 | Toshiba 57H83 57" Rear Projection HDTV

1 Answer

Tv picture


Hi

Most likely reason, Picture tube.

Capital98

Dec 14, 2007 | Televison & Video

1 Answer

Lines on tv


Set starts, horizontal and vertical deflection work, HT ok, crt heaters ok, but no sound or picture
I turned the G2 voltage up and noticed a white screen with flyback lines, frame ok. I detected two badly soldered double diode rectifiers in the secondary part of the power supply ! I checked all other joints, and everything was ok !! success
White horizontal line (no vertical deflection)
Check / replace R548, R549
Sound but no picture except for a couple of horizontal colour lines
Replaced the frame chip TDA8356, set now ok

Nov 23, 2007 | Mitsubishi WS-65511 65" Rear Projection...

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