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31 inch phillips has sound but no picture. white screen with lines through it. it comes on for about three seconds then shuts off.

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I REPLACED THE 3340 RESISTER ON THE PICTURE TUBE BOARD. WORKS GREAT NOW. THANKS FOR THE HELP.

Posted on Sep 01, 2008

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Our lcd phillips tv screen turns completely white after about an hour of use


The TV, most probably, the display circuit or the display itself has developed dry solder/components leaking and the TV needs attention by a qualified service technician.

Jul 14, 2012 | Philips 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

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My KP-51HW40 clicks off after running for a period. The red power light blinks when it goes off but screen stays dark. When TV is shut off for a while it restarts and runs fine. The "On"...


Hi,
KP-51HW40 shuts off due to incorrect white balance and blue arch lines is an evidence of that incorrect white balance. I hope tv standby red light would flashing 5 times then 3 seconds pause and again 5 times when tv shuts down.
This is rear projection tv that has three picture tubes (red-green-blue) inside to generate picture that projected at front screen. These three picture tubes must be drive with correct drive voltage to produce good picture of each color.
Solution for your tv problem is Screen Voltage adjustment that can be done easily if you are handy with electronics stuff repair.
Let me know your expertise level to guide you more and if you feel unconformable by tv repair then local tv repairman will help you to adjust white balance in tv.
Hope these info will help you.
Let me know if you have additional questions.
Thanks.

Nov 05, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Slow to turn on Phillips flat screen tube big screen


That is a common issue with the last generation of the phillips big screens, the best answer for this is one that i got at a meeting with phillips service several years ago. On philips the tv will not show a picture till the tubes are balanced out, simular to sony, but in a phillips if the white balance is not correct the picture and sound will be muted till all three tubes have warmed up enough to produce a good white balance. As the set ages the tubes become weaker and this procesess takes longer.

May 07, 2010 | Philips 43PP9202 43" Rear Projection...

1 Answer

White horizontal lines in my 27 in Phillips Magnnavox tv


I have seen this on mine. Check the cable going into your TV and make sure it is good. The ground portion of the cable could not be making a good connection.

Jan 17, 2009 | Philips Magnavox 27MS343S 27" TV

2 Answers

Phillips 50 inch Plasma


Philips 50 inch plasma tv no video but has sound

Sep 28, 2008 | Philips 50PFP5332D 50 in. Plasma...

1 Answer

Please help


I suspect if you have green lines .you have a bad crt. there are three tubes red green and blue i suspect blue tube. tubes cost is around 300.00 to fix.


thanks doctor video


note sometimes you could adjust screen voltage located near the front grill black box . becareful high voltage ony a pro should do.

Jun 14, 2008 | RCA D52W15 TV

1 Answer

31'sanyo tv analog has a white horizonal line thru it


There is a failure in the vertical amp section. This can be the main output IC, or any of the support components in this area.

An experienced tech can troubleshoot the set, and determine and service the fault.

Jerry G.

Apr 27, 2008 | Sanyo DS31590 31" TV

2 Answers

No picture, screen is dark, but audio and the system control is operational


This sounds like the vertical output IC has stopped working. If the vertical pulses are missing at the yokes then the picture shuts down to protect the CRT's from being burned by the intense thin white line through the center of the picture. I have seen many of those TDA vertical output IC's fail.

Jun 18, 2007 | Philips 51PW9303 51" Rear Projection...

1 Answer

Phillips/Magnavox 9P5544C102 white raster and shuts down


This denotes a problem called blooming the horizontal lines you see are called retrace lines this is caused by the increase in anode voltage which could be caused by an increase in HV section current which trips the overcurrent protection dircuit and turns the TV off.If you do not have electronics experience I would suggest taking the set to a TV repair shop.

May 29, 2007 | Philips 9P5544C 55" Rear Projection...

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