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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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

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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

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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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