Question about Zenith B32A24Z 32" TV

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PICTURE COMES ON THEN BLOOMS FADES

THE PICTURE COMES ON OKAY ,THEN FADES OUT OF FOCUS , BLOOMS. COULD THAT BE A POWER BOARD FAILURE?

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The problem is onthe power supply,
one of the semi- conductor is heating up

Posted on Apr 24, 2009

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Posted on Jan 02, 2017

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Vizio e370vle has sound but no picture


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/

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Sanyo dp42849 picture is slow


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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1 Answer

Sony KP-51WS500: This TV comes on for a few seconds of picture and sound. Then the picture fades to green and then turns off within another 10 seconds. Is this a power supply problem? Or should I look in...


Adjust the Green screen drive,turn it down and see if that corrects the problem.
Remove the Front Bottom Panel on front of Tv and behind it will be the Screen/Focus Control block
It will have 3 controls on Top for Focus to each Tube R/G/B
and under them are the Screen drive controls for R/G/B.
But if adjusting the Green Screen Drive Control does not Fiox It ,then you have a Bad Green Tube.

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1 Answer

Tv says fan 2 going out ! Picture is starting to fad away!


Hello,

If the picture faded away on the order of 10-20 seconds (and if it comes back, also comes up to full brightness in same time frame - possibly with the persuasion of some careful whacking) AND with NO other significant changes such as size, focus, etc., then take a look in the back of the tube for the filament to be lit - the orange glow near the CRT socket. If there is none, then you probably have a bad solder connection on the circuit board on the neck of the CRT. Look for fine cracks around pins on that board. Try prodding it with an insulating stick to see if the picture comes back. Resolder if necessary. Dirty or corroded CRT pins/socket contacts can also do this - remove, inspect, clean, and replace the neck board. It is probably not a bad CRT as the filaments are usually wired in parallel and all would not likely go bad at the same time.

However, if only a single color fades in and out, then a bad connection inside the CRT is a distinct possibility - look for only one of the filament's glow to be coming and going. This is probably not worth fixing.

If the picture faded away with other symptoms, then there is probably a fault in the video amplifier/output one of its power supplies - still probably a loose connection if you are able to get it back by whacking.
Good luck

May 26, 2010 | Televison & Video

1 Answer

Screen trys to show desktop, but quickly fades to


Hello,

Since the power led button is on, the problem with your monitor is the that the picture board of your monitor has develop fault, that is why it tries to show your desktop and quickly fades away.

The picture board of your monitor is bad and will need to be replaced in other for it to display.

The best thing for you to do is to take your monitor to a local repairer or any service center within your vicinity to help with the replacement of your picture board because the fault is not something you can fix on your own in other not to complicate issues.

Take care.

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Seeing a double picture when i use the touch focus feature, it comes up an error.


Convergence board failure no autofocus, This is a common failure on projection tv's. Change the convergence board or the STK's on that board and or associated burnt resistors in that area.

Mar 13, 2010 | Toshiba 57H81 57" Rear Projection...

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My 42PC1DA is just under 3 years. It has been


Normally, it causes by failure of power supply board.

Aug 18, 2009 | LG 42PG20 42 in. Plasma HDTV

1 Answer

Screen fades to white


Most probably failure in the LCD controller IC in the lcd controller board. that no signal was sent out to the lcd driver IC thus you could only see white display. A replacement of LCD panel is the best solution. best regards

May 25, 2009 | Chi Mei Corporation 736A (Silver Black) 17...

2 Answers

Picture fades to black then reappears and repeats fades to black .


Is the sound ok. Yust the Picture. If both dissapear replace power supply board. That is the main big board with the most heatsinks on it. Main power gos from a switch board to main power supply.

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