panasonic CRT model TC-21FX20M off suddenly

[MistQ]

Hi... I'm having a problem with my tv panasonic model TC-21FX20M,
Its sunddenly turn off by itself after few minute watching, i try turn on again but still the same, i try to t/shoot by inspecting any defect for the circuit everthing goes fine even fuse are in good condition, my problem still persist...
Anyone can help me....or i have to find another tv

Rgrds,

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