Question about Zenith B25A02Z TV

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Tv wont come on

I turn the set on,I can hear the clicks that indicate its on, but nothing happens. Another guru said its the flyback...since I know nothing, please advise me on what to do thank you

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If you think a power supply is okey, do you hear oscillation sound. if you do change a line transistor and observe.
if does not work contact me, again

Posted on Mar 28, 2009

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1 Answer

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^.^ hi..
I see that your TV's high voltage flyback is leaking out.
or the flyback cap to the CRT aka picturetube is dirty, or it has a open insulation.
(Warning: Flybacks are extremely dangerous, it has a high voltage that kills. becareful.)

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you need to replace the flyback which is flyback 259296 and also capacitor CP150 and CP114. You can get replacement parts at the following link and they include free step by step instructions with pictures so you can easially repair the set yourself. Heres the link.
http://servicemanuals.vstore.ca/

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I work on these at the shop alot(THERE THE TESTAMONAL FOR THESE SET LOL) ok these sets itc222 chasis from rca have a processor that shuts them down for one of 25 different resons. THe sound you describe indicates to me a few possibilities. the first thing i would check if i had it in the shop would be what is known as the flyback and the horizontal output transistor. if you are a tech. these set can generate pot high voltages so be careful. there is some times i have seen loose ribbion cables but that is rare

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It sounds like you may have a bad Horizontal Output Transistor (HOT) and/or a bad Flyback Transformer. The set is trying to start as indicated by the flashing light, but an internal fault is shutting it down right away. It could also be the Power Supply circuit. A 32in. set is not cheap to replace so it may be worth finding a repair technitian and at least getting a quote. The Flyback is the most expensive part, the others are minimal. If it is one of the above problems it could easily be repaired by a qualified technitian.

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1 Answer

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The green light indicates that it is getting power from the outlet ok.
The clicking is the power relay trying to turn it on but there is an internal fault forcing it to shutdown. You either have a power supply problem, horizontal output transistor (HOT) is shorted or a bad flyback transformer. In any case it can most likely be repaired by a qualified technitian. If it is the flyback it may be expensive.

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1 Answer

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if you are hearing a click and electrical statics when you try to turn it ON, the flyback of the tv is busted there are alot of reasons for that problem lighting is one so dont leave the cable screwed in if ever youre going out for a long time. you can have it replaced by a technician ( flyback). but it would cost you. and im not sure if you can find an orginal flyback considering its 10years old. there are replacement flybacks but quality would not be as good as the original one.

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1 Answer

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OK, it looks like a power supply problem. The click you are hearing might be the shutdown relay connected to the overcurrent circuit. This might be indicating a problem in the Hv section of the TV. To get the tape out you can restore the power supply or what you could do is to try to access the drive motor and find the load and unload gear and try to turn it to take the tape out, this has worked in the past at my shop. If you have no experience in electronics I would suggest you not trying to repair this set because of the danger involved. Take it to a qualified repair shop.

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