JVC Hv-53pro rear projection TV

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JVC HV-53pro rear projection TV. a 53" set.

Fault: There is sound but no picture:

ALL other functions are working fine. However, none of the 3 tubes (R
G B) are working as if no high voltage supplied. Checked the high
voltage supply & it seems OK. I wonder if there is a shutdown switch
somewhere that is activated for no apparent reason. The sound is
perfect.

Any suggestions to resolve this problem is appreciated. Thanks, Paul.

 

[Meat Plow]

JVC HV-53pro rear projection TV. a 53" set.

Fault: There is sound but no picture:

ALL other functions are working fine. However, none of the 3 tubes (R
G B) are working as if no high voltage supplied. Checked the high
voltage supply & it seems OK. I wonder if there is a shutdown switch
somewhere that is activated for no apparent reason. The sound is
perfect.

Any suggestions to resolve this problem is appreciated. Thanks, Paul.

I would make sure there is filament voltage to the crt's. But I also would
presume that a fault like that would shut down the SMPS.