When one of my relatives was dying in a hospital in Manhattan in '03, they had Magnavox sets from the early 90s on wall mounts in the patient rooms. They couldn't be shut off...I tried to shut one down and it simply went into a blanking state, I could hear the horizontal frequency increase. Not sure why...there was probably an override in the system someplace. Most patients and nurses probably couldn't even hear/detect the 15kHz normal horiz osc freq..
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