JVC AV-32730 36"... the tv turns on fine, but after 5 - 30 min or so, "sometimes" the picture all of a sudden go's black. it makes a weird "zzzt" sound when the picture shuts off. Sometimes, it comes back on after a while, sometimes it does'nt. giving the back of the tv a whack sometimes gets the picture to come back on, sometimes it does'nt. Is it worth fixing ?
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Re: JVC AV-32730 36" picture problem..
From what you describe, a solder joint has probably cracked loose in a power supply or deflection circuit, which is quite common. Since you do sometimes see a good picture, all of your major components are fine. Repairing cracked solder joints is a very easy procedure and definately worth fixing on a 32 inch TV. The first 2 digits of the model number indicate the size of the TV.
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You need to replace the power supply board. The new ones have a bigger heat sink - obviously JVC knows about the problem because they made the new ones bigger. It cost $250 from JVC and I installed it myself - took about 3 hours to do. If you are not tech savvy call a repairman. Hope this helps.
the tv turns on fine,
but after 5 - 30 min or so, "sometimes MORE " the picture all of a sudden go's black. Sound is ok
it is 100% loose contact problem.
1 please check for any connector or print for loose.
2 in signal processor ic there might be loose.
remember there is no component failure.