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Yaargh! this TV is frustrating...... it seems the vert/horiz is locking but the washed out contrast look goes in and out, but can sometimes be "fixed" temporarily by jiggling the channel selector.
I might try injecting video past the detector diode and rule out any problems there. I'm still thinking the tuner might be troublesome, but the card edge connectors at the back of the PC board might be problematic, but I've cleaned those several times. I have cleaned the tuner, but I've been gentle (maybe too gentile) trying not to screw it up.
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