MY 32" JVC HAS BLACK PICTURE. WHEN TURN UNIT ON, GOT POWER LED ON, NO PICTURE, HAS SOUND. WHEN PRESS POWER OFF, CENTER PICTURE LITTLE SQUARE LIGHTS ON AND GOES OUT QUIKLY. CHECK POWER SUPPLY SEEMS TO BE OK, ALL DC LEVELS THERE. ANY HELP IS APPRICIATED.
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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electro-medical.blogspot.com/ http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
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.