Question about Toshiba 42H81 42" Rear Projection Television

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Tv goes mute when changing channels

Sometimes whe i change channels i lose sound

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Sometimes may be a bit difficult to find as a problem, once a hour or once a day or what?

Posted on Nov 05, 2012


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Never heard of this problem, but a similar issue seems to be the auto surround sound or TruSurround, whatever it's called. Try disabling that and see if it keeps your audio constant. I disable it on almost every TV I've gotten that had it; sometimes it sounds almost muted otherwise.

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sounds like av main board in back of tv try factory reset or make sure tv is off 10 mins then open back up try giving it hoover sounds daft but a lot of problems happen dust nothink to lose hope it helps mark google how tofactory reset and then make model of you tv should find help try same youtube videos

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there are two things that can cause this, 1 there is a muting transistor on the bottom of the PCB that is a surface mount transistor that goes short. this is the channel mute transistor. when you change channels it is designed to mute the static between channel changes. if it shorts then it mutes. 2 the EE-PROM is defective and needs to be replaced. i'de go with the transistor first. if you are unequipped to do this repair have a tech do it.

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