Question about Zenith B25A24Z 25" TV

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TV Starts but then shutsdown

Hi
I turn on the TV it Starts but then shutsdown have HV for a couple of Seconds then nothing.

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I'm having the same problem, but I have a 13" with built in vcr. It acts like it's jammed with a video tape (it's really empty), and turns itself off.

Posted on Mar 14, 2008

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Hi, I have a Sony KDL-46XBR9 LCD Digital Color TV. This morning my son was watching cartoons and it clicked itself off. It has sometimes done this in the past, so we did something else for a couple of...


This tv have a power supply board is the causes and the problems.Ur tv power supply board finally gave out and not supply the right voltages to the tv system anymore.That the board,where the tv power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

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Turned on tv no picture only sound then i heard a pop and smelled burning tv turned itself off. 5 min tried turning on tv again nothing happened tv does not turn on at this time


Your RCA TV needs serious troubleshooting. Burning smell is from HV transformer or resistors smoking.

Most likely power supply and/or high voltage circuit or convergence circuit. Many times RCA have multiple or secondary faults that occur with HV or convergence failure.

Repair of RCA HV or convergence usually requires exact manufacturer parts and upgrades or repair in power supply. I would not advise trying this repair without manufacturer support for correct part numbers and service bulletins.

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Tv won turn on


This could be caused by a bad HV block. I would not take on replacing unless you know your way around HV circuits on Projection TV's. I would call a repair facility to give you a estimate to repair.

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I have a Magnavox 51" Projector TV. Model 51MP392H/17


Hello bullmuscle,

This is a power supply problem, I would suspect the HV power supply because the primary and secondary supplies anymore are tied to the HV power supply. This type of repair requires certain pieces of equipment, to test voltages, look at signals, and to if need be test for shorts in inductors (Switching PS transformer and Flyback transformer). I would not recommend that you try to fix this yourself, The cost for this type of problem is not that expensive and can be done in one evening, if the parts are available. You may be fortunate and it could be just a blown fuse, in the HV or LV power supply circuit

I hope this helps,

Thank you,

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SAECO Incanto Rondo espresso machine


Hi,

I think you have to take it to a Saeco service center, they have to upgrade your power board in the machine.

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Picture fails


hi,

sounds like a high voltage issue, it will have to go in, i dont recommend self servicing that. may sound strange but Ive seen several tvs go by way of spouse having a plant above or near the tv, that person watering it and a few hours later mad spouse sitting in front of a busted tv that sounded just like that. also I had a cat that sprayed one and it did that. just a couple ideas for ya.

J

Jul 12, 2008 | Philips Televison & Video

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Karcher Pressure washer


Hi
don't know if this will help, but when I use mine, to start the pressure up I have to turn the nozzle to fine spray then turn it to the power spray and it works every time, shouldn't have to do this but I got it for nothing.

May 29, 2008 | Washing Machines

1 Answer

I'd like to add another on the power problem


A common failure in these units is Q401, Toshiba p/n# Bz510004 is a 2SA1624 (HV amplifier) which finally fails due to a resistor R408 Toshiba p/n# Bz210285 a .47 ohm/1w metal oxide having changed in value and at last opening...
This isn't an expensive repair for a qualified shop - but I would suggest not continuing to test your shutdown circuit. What's happening is that HV (high Voltage) is builds beyond tolerances and the shutdown circuit turns your unit off to keep from causing any severe damage. If it failed you could likely burn out the SMPS or cause some substantial damage..
Good Luck!
Bill

Nov 10, 2007 | Toshiba MD20F51 20 in. TV/DVD Combo

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