Quote:
Originally Posted by Olorin67
Horizontal line means loss of vertical deflection and vise versa.
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The "vice versa" condition (vertical line) cannot occur in modern TV deflection systems. The only way a vertical line could ever appear on the screen would be in a very old TV (pre-war to about 1950), if the set used an RF high-voltage system; the flyback HV system, used in all TV sets from the '50s on, is set up so that if the horizontal sweep fails for any reason, the high voltage to the CRT 2nd anode goes with it.
You are correct, however, as to the vertical sweep. Failure of the tube or of any of the components in the vertical sweep stages will stop the vertical deflection, resulting in a horizontal white line across the width of the CRT screen. Turn the brightness all the way down to prevent burning the phosphors.