Question about Philips 60PP9202 60" Rear Projection HDTV-Ready Television

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No picture,sounds and system operational

No picture dark screen,sound and system operational, tubes lit,no screen and focus voltage vertical circuit has complete negative and positive supply,is it possible if one of the crt's are deffective may cause similar problem?

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Re: no picture,sounds and system operational

The vertical circuit may have its positive and negative supplies, but is the output waveform correct? I have seen many of those TDA vertical outputs open up and cause exactly what you are seeing. The + and - supplies are there but there is no output. Replacing the IC usually cures the problem.

Posted on Jun 28, 2007

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Good sound no picture

A older set------look to see if display comes on (channel number or menu) if not someone has to look to see if the filaments in the three picture tubes are lit or not.

Several voltages : High voltage, screen voltage, filament voltage all go to the picture tubes.

Oct 30, 2012 | Sony KP-61V75 61" Rear Projection...

2 Answers

Sound but no picture

This could be a problem in the vertical sweep circuit, as when the vertical circuit fails, The video or screen will blank out so the picture tubes do not get damaged. In this chassis, I have seen the convergence IC's cause this, or the capacitor in the sweep power supply that feeds the voltage to the vertical IC has failed and blew out the vertical output IC. If you have no solid state repair experience, play it safe and call in a trained tech to assist you in this repair. Good Luck.

Aug 11, 2007 | Toshiba 43AX60 43" Rear Projection...

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Sound no picture 56h80 toshiba

This set will blank the picture for several different reasons:

No filament voltage to the three tubes it uses.

No high voltage to the three tubes it uses.

No vertical or horizontal sweep (prevents all three tubes from having the screens burnt with a line.

Some of these can be tested but most require a schematic etc.

Set has several fuses and some do not look like fuses--called pico fuses.

Jun 11, 2012 | Toshiba Projection Televisions

1 Answer

Toshiba 50A61 have sound but no picture - all fuses check okay

Not too many--if sound is developed from the set and not a surround system the set will blank the 3 picture tubes for a few reasons:

Voltages missing at the tubes (high voltage or screen voltages etc)

There is a loss of vertical sweep or horizontal sweep--set will do here this to prevent an INSTANT burn mark on all 3 tubes.

One thing you can try to look for is to see if the filament in each tube is lit---rather dim as 6.3 volt one---if lit the above reasons are your problem.

Without a meter, a schematic etc not much more you can check.

You should hear a faint whoosh sound when you power the set on--the high voltage coming up.

Jun 07, 2012 | Toshiba 50A61 50" Rear Projection...

1 Answer

Sound but no picture

There is no one answer--an explanation:

The Toshiba indicated here has 3 picture tubes---the set will blank or turn them off if there is a problem in either the deflection circuit (vertical or Horizontal) or if any of the voltages (supply and screen sources for the tubes are missing.

It means either a critical voltage is missing or a deflection issue causes the set to turn the tubes off so a mark (either vertical or horizontal) is not instantly burned into the screens of all three tubes.

Means for starters voltages and some other things need to be taken to determine where problem is.

May 21, 2012 | Projection Televisions

1 Answer

My poor mitsubishi 55908 just lost it's picture after working flawlessly for 10 years. The sound is still there, but the screen just went dark. Is this something that is repairable? Thanks!

This is a high voltage problem, but first try turning up the screen voltage located on the focus block. This requires opening the back of the TV, be careful of dangerous high voltage. See if there's a picture after turning up the red, green, blue, voltage adjustments, if not then vertical sweep, Flyback, or convergence need servicing. This repair shouldn't cost more than $300.00 dollars, maybe less. Contact me at my link below so I can help you further. If this helps please rate :-)

Oct 22, 2010 | Mitsubishi WS-55908 55" Rear Projection...

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check the high voltage with the screen control turned up high where there is no raster. suspect problem within the video circuit where there is no high voltage or defective picture tube.some time when the screen is black and the screen control advanced,you can see if the tv has video or vertical or horizontal problems on the screen.service the high voltage circuit if there is no raster or high voltage is raster can be caused by the no heater or filament in the CRT.---- a defective picture tube can cause many problems, such as, poor brightness ,missing colors,intermittent picture,poor focus,a single-colored raster,arching in the gun assembly,retrace lines in the picture,negative picture,chassis shutdown,noheater or filament lit and no raster to name a open filament or heater can cause no picture or no raster symptom.a defective CRT can have an extremely bright screen.loose particles of the cathode element can lodge between the grids and cause an intermittent black and white picture. simply tap the ends of the CRT gun assembly and notice if the picture begins to flash off and on.---- with a leaky picture tube after turn on the raster dims and get extremely bright.a dim picture with no green in the raster can result from a bad green assembly. a heater-to-cathode short can cause a raster to change colour or a result in no raster at all.replace the picture tube if there is severe arching in the neck of CRT. excessive brightness with retrace lines and a vertical collapse to a thin line can be caused by a bad coil on the neck board of the picture tube.rejuvenate the picture tube when there is very bright green screen. check for the resistance change on the resistors of the CRT neck board for an excessively bright picture with retrace lines.excessive dust inside the CRT spark gaps within the picture tube socket can cause the very bright raster and the chassis shutdown.a defective video amp,luminance buffer,or reference transistor can cause a bright picture with retrace lines. -------- for getting any required parts to replace you can get it from or from or from --------- thanks.please do rate the solution.thank you for using fixya.keep updated.

Sep 06, 2009 | Projection Televisions

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Vertical jitters on picture - JVC AV48P776

What you are experiancing is loss of High voltage. The line is called a retrace line. It is usally caused by failure of the flyback circuit or aging of the TV tube. This is the single most common failure with CRT based display systems. The high voltage can be tweaked up, to accomidate for the age of the tube. Its a short term solution. Because of the high voltage nature of this circuit, suggest a professional repair.

Jun 29, 2009 | JVC AV48P777 Television

1 Answer

Hey own a 2003 hitachi model #46f500. love it a lot,but has a tint of red on screen. when dark movies are on gets real dark. when its day light on tv it looks great. info please

It sounds like the CRT tubes are weak which will not practical to replace them.

But try to clean the dust on tube first and if it doesn;t help do this...

Risk of electric shock, focus block carries 4 kilo votls, do at your own risk or DO NOT do it at all.

Just try to adjust the screen voltage adjustment to brighten the 3 tubes from focus block, to do this you have to open the back then let the TV run for abut 10 minutes beofre adjusting, each tube has its own screen voltage adjustment, read the label make sure not to tuch the focus adjusment, do not crank up too much make it very slow or your TV will show retrace lines or it will shutdown.

good luck.

Feb 27, 2009 | Hitachi 46F500 46" Rear Projection...

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...

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