Our TV was working fine then shut off. We turned it back on and we do not receive a picture, only a high pitch sound when we plug it in. We cannot turn the sound down with the remote. We have to unplug the TV if we don't want to hear it. We're not sure if it would be worth it to get the TV repaired or just buy a new one. Any ideas?
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Sounds like trouble in the standby/power up circuit. have you tried unplugging the TV for a half hour and seeing what happens? It might start up but I think this problem won't go away. If you heard a high pitched buzzing it sounds like a problem in the high voltage not letting the start up circuit work. threy are related. The start up circuit waits for the high voltage to stablize and then switches it on.
the most likly cause of this type of symptome is a shorted horizontal o/p transistor. typicall the part is 10 to 40 cdn. labour will depend on your local service shop rates. it takes abot 30min to 1h. to chane typically (if no problems are run into.).
The horizontal output transistor drives a transformer that gives you the high voltage to light up the picture tube,either the transistor or the transformer have gone bad,sometimes both have to be replaced and sometimes the transistor fails for no reason by itself.Be safe and call for help if you are not familiar with tv service.
Is this a Toshiba or an RCA? The problem description does not seem to be right. From what your saying though it sounds like there isn't any high voltage. If you are not qualified to work on TVs you probably should take it to a shop for repair.