have a KV36FS10 with the exact same problems as your 2 sets. I have spent some time on this set trying to determine the cause of the sets shutdown. All my power supply voltages are good except -15 v (at -14.1 volts). Checked all shutdown inputs into the Jungle IC (IC355) and everything seems to be good. IC355 is also putting out vertical signals. If U have any help on this - please drop me a line. If U replaced mother board in your sets then U put in a new IC355 (jungle IC). Other thing to check is yoke on CRT and also CRT heater. When U replaced mother board - U also replace tuner ? Could be tuner SDA is low which shutdowns Jungle IC. Thanks, John

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