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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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.
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Bearings in Alternator, water pump, power steering pump or even a squeal from Vacuum line, EGR diaphram or similar. Check power steering fluid level.
Now when you replaced the tensioner, did you notice more pulleys that were just "there" and not connected to anything? These are idler pulleys and are helpful in routing the belt. They have bearings too!
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.
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?
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.