monitor question (problem diagnosis)
Watzman at neo.rr.com
Mon Nov 7 08:57:44 CST 2005
Re: " What does a single vertical line in the middle of a display indicate?"
This is a symptom that is normally never seen.
It would, in theory, indicate loss of horizontal deflection. The problem is
that loss of horizontal deflection in virtually all monitors also causes
loss of high voltage, which keeps you from seeing ANYTHING. [The high
voltage is obtained from the horizontal output transformer ("flyback"
transformer) in virtually every TV set and monitor made.)
One possibility: If the horizontal deflection yoke was open, there could be
a loss of horizontal deflection while you still had output from the
horizontal output transformer. Usually, an open yoke would shut down the
horizontal output and high voltage, but it's the only way I can think of
that you might get loss of horizontal deflection and still have high
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