Question about Panasonic PT-47WX51 47" Rear Projection Television

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Power The power will turn on, then once the a picture shows on the screen- it shuts off.

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TV's have a circuit that monitors the high voltage and shuts down the set if it senses something amiss.
On projection types, figure on just replacing the entire board that has the flyback transformer on it.
Hope ya fix it!

Posted on Jan 31, 2008

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II get sound for about 15 sec. but no picture and then shuts off


kp57ws50_57_in_rear_projection_hd_228277.jpg Problem with Sony KP-57WS520 57 in. Rear Projection

This model is really prone to one problem in particular--screen even briefly comes up bright red, green or blue and set shuts down.

15 seconds from turn on front power light should blink as set checks several things internally---if something wrong it does not let picture show.

Usually after shut down or failure power light will blink a sequence of blinks but not always depending on problem.

Did you see the screen at all go red, green, or blue before?

the more you tell me the better I can help

Mar 28, 2012 | Sony KP-57WS520 57" Rear Projection...

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Have a Sony KP-65WV600, already replaced d board once, and replaced convergence ic's once also. Now as soon as I turn unit on, turns to red screen and shuts off, video that is, audio works ok, noticed...


Check High voltage Block.After replacing ic's (STK convergence ic's) you need to adjust Black&White scale.Turn ALL screen adjustments to min.Turn TV on and adjust screen slowly for each gun (I would start with Red first ) when you came to point that you see red background with white lines across, at that point G2 is too high (that will cause TV to shut down,don't worry just lowered adjustment and turn tv back on) so adjust to proper voltage and do the same for each gun.After that, adjust focus for each gun (again all controls are on High Voltage Block and HVB is mounted on front of your tv after you take speaker gril out) black box with 6 controls' screen RGB, focus RGB .
You should do that in dark room in order to get perfect Black&White scale,when all guns are adjusted properly you will see grey picture.Make sure 'Color" adjustment on your display is down to 0. Another step is convergence adjustment ,Flash Focus etc.If TV stil shuts off after all, your Red picture tube is short inside,take crt pcb from tube,make sure TV is unpluged from power before that, and turn Tv on .If stays On tube need replacment...good luck)

Aug 22, 2011 | Sony KP-65WV600 65" Rear Projection...

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When I turn on my tv, 20 seconds later it shuts itself off and then it comes on again and 20 seconds later shuts off again. The screen never comes on either.


hello, If you can turn it back on with the s momentary key or power button:
When it shuts off, do you need to push the power button once or twice to get it back on? Also, does anything else about the picture or sound change as it warms up?
If once, then the controller is shutting the TV down either as a result of a (thermally induced) fault in the controller or it sensing some other problem. Monitoring the voltage on the relay coil (assuming these is one) could help determine what is happening. The controller thinks it is in charge.
If twice, then the power supply is shutting down as the controller still thinks it is on and you are resetting it. A couple of possibilities here would be low voltage or high voltage regulation error (excessive high voltage is sensed and causes shutdown to prevent dangerous X-ray emission). A partially dried up main filter capacitor could also cause a shutdown but there might be other symptoms like hum bars in the picture just before this happened. Clipping a good capacitor across the suspect (with power off!) would confirm or eliminate this possibility.
If it uses a pull-knob (or other hard on/off switch), then this may be like pulling the plug and would reset any abnormal condition. NOTE- It require you opening the back cover of the television. Goodluck

May 20, 2010 | Toshiba 46HM95 46" HDTV

1 Answer

Power failure


probably a bad lamp, needs to be replaced. Does the green light blink?

Oct 29, 2008 | Mitsubishi WS-55511 55" Rear Projection...

1 Answer

Screen turns blue then shuts off.


I already replied but once again..
Symptom shows Blue CRT (picture tube) in your TV might defective and need to be replaced. Its high tech repair issue, so contact tv tech person if you don't have enough knowledge about tv repair.

Sep 05, 2008 | Toshiba 51H84 51" Rear Projection...

1 Answer

Powers up no picture but shows picture on power down


Try unplugging the three convergence plug wire clips on the SSM board and then try to power up your set, let me know what happens.

Jul 25, 2008 | Philips 60P8341 60" Rear Projection...

1 Answer

I loose picture on my big screen


bad voltage regulator - BA09FP requires a bit of tech experience to replace, but its relatively easy. It took me about 1 hour to replace mine. If you need clarification on this, email me at Doin12volt at yahoo

Jul 03, 2008 | Mitsubishi WS-65513 65" Rear Projection...

1 Answer

Sony tv blinks 30+ times or once, no picture/no sound, then shuts off


sounds like a problem in the stand by power supply as the Set is not blinking any code indicating its in protective shut down. I would assume its one of the low voltage regulators that has shorted. You would need a service manual to actually troubleshoot the start up and stanby voltages. Let me know if you would like a link where to purchase the manual. I will post a link that provide free tech assistance to help diagnose and repair your set when you get a manual.

Mar 27, 2008 | Projection Televisions

1 Answer

SAMSUNG TV MODEL HLR5067W


does the picture be frozen on screen for about one second before it cuts off. if so need new digital board

Dec 04, 2007 | Samsung HLR5067WX 50" Rear Projection HDTV

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