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Sony Tv...help!!!


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Old 18-01-2006, 21:04
foggydew
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tearing my hair out here...

i have a sanyo 32 inch fwn5 (not sure exactly about this model but i'm judging from pictures on google). Every so often the picture simply goes blank and stays blank while the sound remains. It can remain blank for anything from 2-3 hours to 2 days. When i go to turn the telly off the white 'spark' shows suggesting the actual screen is still functional but the picture is not being received. The TV also still makes the whining noise associated with a live picture.

Is there anyone who might have a solution or may have experienced similar problems and have an idea of cost to get fixed - or even better a technician (if necessary) who could guide me through a remedial procedure...if its straight forward enough.

Please help as its currently on blink and the missus wants to watch desperate housewives!!!
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Old 18-01-2006, 21:18
Astaroth
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How old is the TV?

I had a lesser version of the problem and it luckily was a just the high tention cables(?) - thick cables that run over the outside of the tube which were shorting on the tube... a case of cleaning it well to remove dust etc and resetting the plastic spacers stopped the problem with my screen. Unfortunately there are plenty of other things that can cause these types of problems which are much more expensive to fix.

I will leave it to the much more experienced people to give their opinions
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Old 18-01-2006, 21:56
foggydew
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it's 3 yo mate


should i attempt to remove the casing??
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Old 19-01-2006, 10:54
Dino
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Originally Posted by foggydew
should i attempt to remove the casing??
I wouldn't recommend doing it unless you know what you are doing and know your way around the insides of a TV set.

There are potentially deadly voltages running around inside TV sets, even when unplugged.

If you think it is worth repairing, find a local TV repairman to give you a quote.
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Old 19-01-2006, 11:03
fat controller
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Wouldn't advise it to be honest. There are two types of thick cable that run near the tube - one being the degauss loop which demagnetises the tube when the TV is first switched on (this all the way around the tube and is usually held in place quite near the front cabinet of the set) - this one is the least likely to bite, but alos the least likely to be the cause of your problem. The other is the HT lead, sometimes known as flyback lead, this carries a VERY HIGH voltage up to the top of the tube, which is used to return the electron beam inside the tube 'back to top'. This lead can be identified by the way it attaches to the tube - the top end of the cable has a suction cover (looks a bit like the end of a very small sink plunger). DO NOT PULL AT THE CABLE OR REMOVE THIS CUP IF YOU DO NOT KNOW WHAT YOU ARE DOING, IT IS COMMON FOR THERE TO BE A VERY HIGH RESIDUAL VOLTAGE EVEN IF THE TV HAS BEEN OFF FOR DAYS!.

Although the HT lead is a possible candidate for your problem, it would be WAY down on the list of things to be looked at. First would be dry joints, then component failure.

Find yourself a reasonable local independent and give them a call - many offer free estimates nowadays (they hope you'll buy your next one form them if your one is dead) so you haven't got a lot to lose.

Good luck
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Old 19-01-2006, 11:33
foggydew
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ok well thanks for the advice guys i won't be venturing under the casing!

i take it that its not something i can sort from an engineers menu or similar...
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Old 19-01-2006, 13:16
fat controller
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Sounds more like a physical fault rather than a software one. If it turns out to be a dry solder joint, that shouldn't be too horrendously expensive to fix - the worst part of the job is finding the dodgy joint (can take time). I'd avoid the bigger repair firms and look for a smaller, locally owned outfit as they tend to provide better service.

Don't know if this helps, but a quick browse for repairers in the Glasgow area came up with a few, THIS ONE looked reasonable as they work up to a capped rate and if its going to be more they will call you first so no nasty surprises.

Last edited by fat controller : 19-01-2006 at 13:23. Reason: additional information
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