Question about RCA F31317 31" TV

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No power and squealing!

RCA F31317,went out, now no picture and makes loud squeal sound from left rear. I've been told over and over again that it's an easy fix if I know how to solder, I use a solder iron for a living, I just need to be pointed in the right direction. What am I looking for? In what general direction is it at? What does it look like? Any specifics would be great.

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Re: no power and squealing!

There is going to be a wire that is connected to the back of the tube. The item that wire comes from (Flyback Transformer) needs to be replaced. Also, the HOT (Horizontal Output Transistor) is likely bad as well. It'll be a 3 pin unit connected to a heat sync around the Flyback.

Posted on Jun 18, 2007

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Does it make a squeal sound while plugged in to power? If so, possible horizontal output shorted. $150-$200 about.

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After tv is on for approx 20-30 mins it starts to make a loud high pitched squeal or whine. once turned off for approx 10-15 mins can turn it back on for another 20-30 mins before squeal will return....

Sounds like a problem I had with a Polaroid t.v. Take the cover off the back and look for capactors that are buldging on the top. The top should be slightly concave. If they are convex at all, you can buy new one at Radio Shack and replace them for under $5.00

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Makes a squealing sound but there is no picture on the screen

The squealing sound that you hear most likely comes from the power supply.
And it is most often caused by a shorted horizontal output transistor.
But that would have to be determined by opening the set and testing it. It is a common problem in rca`s and other sets, it is often caused by a bad flyback(high voltage transformer) and/or associated circuitry.
Hope this help to clarify things a bit.
P.S please do not rate this answer(unless it helps)as it is only a suggestion/information.

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the high pitch squeal indicates shorted component/s. the transformer goes hot co'z its being overloaded by the shorted component, it too could be the one creating the squeal!!

if you have experience with electronic troubleshooting, try to test some of the components particularly on the secondary part of the transformer.
Be careful and make sure the TV set is unplugged.
test for shorted diodes and transistors, if you're in doubt of your readings try to desoldering one leg of the diode then proceed with the testing/measuring. replace any of the bad components you find exactly with same part number or replacements with the same rating.

spend more time on it resoldering some other cold soldered components.

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A squealing noise generally indicates that there is something loading down the switching power supply. Generally a shorted component will do that. Without any other information it's hard to tell which circuit could be the culprit. It may even be a faulty power supply itself. Was there any problem prior to this condition? Any odd picture problems, shrinking etc. or sound issues, tuning issues?

Aug 27, 2008 | RCA F36645 TV

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Don't mistake hissing sound with a possible high pitched squeal. You probably have a shorted horizontal output transistor. Take it to a service center to be looked at by a professional.


Feb 12, 2008 | RCA F31317 31" TV

1 Answer

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Your set is shorted circuit condition. The power supply is making the noise. Unfortunately almost any of the hi current circuits will do this. If picture went out 1st look for video or hi voltage problems.

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1 Answer

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