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I think it is quite a strange a fault that I would put it out there for suggestions.
Fault - The sound on the TV goes 'mute' at periods of about every 3-5 mins(not consistently), and also goes mute as soon as you change channel. The only way to get the sound back is to turn the TV off and back on again.
The fault only occurs when we put the heating on! We put the heating on when the temp is about 15-17C in the room and we raise it to 20-22C. So we are only talking a 3-5C temperature change and this didn't happen during the Summer when Room temp. would have been at a similar level.
The TV is not near a radiator(the nearest one is 8 feet away). The heating system works by way of 'remote control' at 433MHz. The 'TV' we watch is through a Sky box but I'm pretty sure it's not this, as resetting this does not bring the sound back and the missus assures me it happened once whilst watching a DVD.
The TV is less than a year-old so I will be getting an Engineer round, I just wondered if any of you had any good ideas as what it could be? I have one(not entirely convincing idea) but I will wait to see if anyone else comes up with it
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Voltage spike ?
Nihil obstat
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Bad solder. Get it exchanged.
People say nothing is impossible, but I do nothing every day.
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Did you check your hearing aid?
Seulement, dans certains cas, n'est-ce pas, on n'entend guère que ce qu'on désire entendre et ce qui vous arrange le mieux... [^]
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Un francais en ces lieux !
Monsieur, bien le bonjour !
For the language nazis : A Frenchman in this place! Gentleman, be greeted !
~RaGE();
I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus
Do not feed the troll ! - Common proverb
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Je vous retourne la politesse cher ami.
Il est vrai que la communaute francaise n'est que peu ou proue representee dans "le salon"
And for those of you who wonder why I type french without accent it's because of my Ch Ch US keyboard (and also my lazyness to check for corresponding html codes)
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Some EMC problems with the heating system ?
Or, you have a gerbil, which makes screams (because its cage is too close to the heater) in a range of Hz which coincidentally maps with the remote control "Mute" key signal frequency.
~RaGE();
I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus
Do not feed the troll ! - Common proverb
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Rage wrote: n a range of Hz which coincidentally maps with the remote control "Mute" key
This did cross my mind but then wouldn't pressing mute on the control un-mute the TV(it doesn't).
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Now that's definitely the most probable option: 5 
~RaGE();
I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus
Do not feed the troll ! - Common proverb
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Pompeygeist
Every man can tell how many goats or sheep he possesses, but not how many friends.
Shed Petition[ ^]
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Sounds like the lower humidity level might be the problem, though I don't understand why. Try cooking some water next to your TV?
Wout
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wout de zeeuw wrote: Try cooking some water next to your TV?
Why? what would I expect to see?
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Hear rather.  Winter is dryer than summer at equal temperatures. So increasing the humidity level to make it equal again would exclude that parameter from the variables.
Wout
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Dry joint.
Not the type you smoke...the solder variety.
The time delay implies that heat is involved, which points at either a dry joint or a defective component. In all seriousness, have you tried hitting it? If that brings the sound back (even briefly) that that points at a solder joint problem.
In the old days that just meant running an iron over the board, but with the density of modern SMT and BGA devices that option isn't really there any more. 
If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.
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OriginalGriff wrote: In all seriousness, have you tried hitting it?
You know I haven't thought of this. If it had been the old style CRT, this would have been the first thing I tried. 
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I keep my cable box on a laptop cooling pad (you know, the thing with a couple of fans and a USB connection) otherwise I get a green screen of death occasionally, and have to reboot the cable box.
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We used to have a cat whose favourite sleeping place was on top of the Sky satellite box, because it was nice and warm. That had to be rebooted at intervals too.
If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.
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OriginalGriff wrote: That had to be rebooted at intervals too.
The cat?
I wanna be a eunuchs developer! Pass me a bread knife!
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Get thee behind me Satan!
If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.
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Slightly off-topic (I'm an expert on associating to old experiences):
In the minicomputer days, when computers where two meter tall 19" racks, I worked for a company making such machines. One customer experienced a crash every single day. The maintenance people ran all the tests available, without detecting any fault. After a lot of frustration, we placed two guys with loggers of all kinds directly connected to the computer, planning to "babysit" it 24/7 until it crashed again.
It must be explained that this computer managed a lot of automated equipment in a huge factory hall with about two hundred workers, placed up to the wall of this huge hall. The computer seemed to run without problems. Then around noon the "babysitters" jumped to the ceiling, clutching their hands to their ears to soften the sound from that really huge alarm bell telling the two hundred workers to go for lunch. Everybody immediately ran away ...and the computer had died. When the workers returned after lunch and the computer was dead, noone associated it with the lunch break, per se.
The cause of the problem was the huge hammer of that huge alarm, pulled by a huge solenoid, which crated such an intense field of electrical noise less than a meter away from that CPU, strong enough to kick it to death. The service men moved the computer a few meters to the side, to get away from that noise field, and the next day (and thereafter) the machine had no longer daily crashes.
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