Question about Protron PLTV3250 32 in. LCD Television

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I get no reaction from attempting to turn the TV on, I pulled it apart and found a burnt transistor on the main board. I need to know where to find a new board / or how to order a new transistor to fix...

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Check this link to find the parts you need. Finding the transistor itself might be more difficult unless the part markings are clearly.
Good Luck.

Posted on Jul 17, 2009

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What's the likelihood of my TV being able to be fixed after a lightning strike killed all electronics on one wall?

Probable power supply fault now. Maybe if you replaced the power board it might work again.

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I have a samsung tv with aound and no pic made checks that i found on the Internet. Found that i have no backlights ao which board do i replace .model # un32eh4003fxza

It is the backlight that is burnt out not the circuit boards, pull it apart and check also where the backlight connects if that connector is burnt replace it also.

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Rear projection screen tv flashes power button but doesn't turn on

These blinks (flashes) are fault indication. By the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside the TV. Count the blinks occur at one time switch ON, carefully. Do it once again, and make sure about the number of blinks. If the flashes are continious, non-stop, the main system control IC should be suspected. If you wish to get more details, check the site linked here. It has blinking codes detail to many brand TVs. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy.

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29 onida oxigen h out complant

you mean a horizontal output transistor problem with your tv unit?. there are possible cause why a horizontal transistor get bad. it depends to what kind of trouble does the tv unit have. here are some of trouble that i encountered of H-out problem and how i fix it
  • leak regulator transistor, the problem of the tv unit when you turn on it works but suddenly shut down then the horizontal output get bad. now how are you going to know if the transistor is leak and shorted. by means of a digital multi tester or an analog tester. a good transistor must have a reading of .4 to .9 in a digital tester below or above to the range is said to be leak transistor. a regulator transistor is usually found at power supply section. how to test a transistor using the digital tester. get the tester and then pull out the transistor to chassis board. vinceisaac_24.jpg as you can see in the image above is a digital tester some other brands may vary in ranges but all the function are the same. now set the pointer to the resistance checking select to the range with diode sign. a transistor have 3 pins for base, emitter and collector (component term ) with the use of test probe now touch one end of probe either of the 3 pins and other probe to the other pin.check the reading to the display of tester if no reaction reverse the polarity until you find the correct reading as what i said a good transistor is about .4 to.9 and then try this process to the other pin of transistor to check if all the junction are good.
  • defective deflection yoke, the problem with the tv every time you turn on unit the horizontal output get damaged. a deflection yoke composed of two windings for vertical and horizontal coil ( technical term ). now how will you know if the coil has problem. a yoke has 4 wires, 2 wires for vertical and the other 2 wires for horizontal now with the use of digital tester set the pointer to the resistance checking either in a lower range. touch with the test probe either of the 2 wires check the reading if 0000 that means shorted sometimes cause by an over heat the insulation get damaged. repeat the process to the other 2 wires, a good coil at least has a reading about .5 to 1 ohm for horizontal and for vertical around 1.6 to 6 ohms it may vary depending to the yoke needed by the tv unit. vinceisaac_25.jpg the image above is sample of deflection yoke it was located and installed at the neck of ( crt )picture tube. if one of the coil winding has problem it always damaged horizontal output transistor and other part . i hope this trouble that i encountered will help you too to fix your problem good luck.

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1 Answer

Vizeo 42 hd plasma tv (model v42hdtv10a)won't turn on. I checked the fuses and found one burnt out on the upper left board (when looking from the back of the tv.) I replaced this fuse (4 amp 250v...

Hi, do you know from what area the smoke came from?
4 Amps seems a little high. Sounds like power transistors have blown, maybe even a capacitop or a main filter cap has gone short.

Sorry i can't help much, is there anywhere inside that would indicate a different manufacturer?

Board numbers, chassis numbers , i will try and help.

Regards - Anthony

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1 Answer

Rca 32 screen turns on but stays black

Theres no start-up signal being encoded, this means the interface board has an offset capacitive value. You need to test and measure the capacitors and npn/pnp transistors, along finding some open diodes too on the main board (interface). You have to test the capacitors under their operating voltage also to see at which point their breaking down. The problem is a 'load' condition on the main board. You can repair the board if your savy and you have test equipment or you can just replace the board. If you want to replace it e-mail me and I'll help you out....

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Power surges are extremely unpredictable, they can damage everything inside the tv, from the power supply printed circuit board, to the main printed circuit board. Normally the power supply takes alot of the damage from these things, so check over the power supply for any damaged components, any burnt out parts on printed circuit board, and also check the fuse. Good luck.

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1 Answer

RCA F20632SE 20" TV

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.
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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3 Answers

Niko 32" TV no screen

Inverter card.
p/n vit70002.00

Approx $180

The inverter card drives your cold cathode lighting.
If you pull the covers you will find all the lights out, if any of the eight legs of the inverter go out (driver transistor) the card will not work.


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You will have to trouble shoot the board down to the component level I'm afraid. I would for sure pull out the transistors or the FETs to get a good reading on the parts.

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