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Re: No Sound on TV
In the menu option, see and make sure that the speakers are turned on and that the Mute is off. Also if all that is good then unplug the set for a good 24 hours. If that does not help, and your not experienced at repairing solid state electronics, please seek out a local repair person to trouble shoot this for you.
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Hmmm, really hard to say without looking at it whether it's worth the repair or not. Do you have cable or satelite connected to it? IF you are just recieving signal "off air" in about a year it will not work by itself any more. The nation is going digital. IF it is connected to cable or satelite it will probably still work fine as long as you have an analog converter box of either kind. OR if the basic cable is analog and not switching to digital. (ask your cable company) That should help you determine whether to replace or repair. As for the sound issue it is my guess that it will probably be more complex than simple. Costing $55-$125 to fix. At that rate you can buy another as easily. MY only suggestion is buy a tv that has digital capabilities so regardless you are covered! The small TV's are still pretty cheap even with the new technologies.
Rca has been known to have bad solder joints in the deflection circuits. Usually around the flyback and transformers.. check it over real good. Just be careful as you can still get shocked after the powers removed the capacitors and picture tube will hold a charge in them.
only thing I can think of is for you to check your cables... assuming you are using a coaxial cable for the satelite and rca cables for games and dvds, I would recommend trying a different coaxial cable. There is also the chance that the coaxial connection on the tv itself is messed up. you may try buying an RF modulator that will convert coaxial to rca, most rf modulators convert rca to coax. so make sure it does what you need before you buy it. tech guys at store should be able to help if you can't figure it out.
Since the you were vacuuming behind the set before this happened, I'm going to assume that you unplugged an input.
Check the wiring, not just on the back of the set, but, on the back of the peripherals (DVD, Satelite, cable box, etc.)
If wires are connected, then, take a component, such as a VCR or cable box and hook it up to the RF connector (AKA the cable connector) and run it on channel 3 or 4. If you have sound, then, you have a configuration problem and need to rewire your set.
Hope this helps.