We have several of these monitors, and they are all performing very well except one. It has started showing ghosting lines that go out to the right of an object. The object can be letters, a dialog box, etc, but the lines all appear to the right only. None of the standard controls seem to affect the lines.
I haven't opened it yet for lack of time, but just looking for ideas. Thanks.
WT
Classic case of Ringing caused by an unterminated line !! I don't know why your Video line is ringing but the first test would be to plug in a signal using a working signal source, and cable from a working monitor. I had this problem on a SUN monitor and cured it by switching the Video Signals onto the Terminated Connections. Just imagine a Square Wave being fed into an unterminated line and seeing the signal being reflected from the unterminated connector ie a series of ripples (ghosts} !
Yukio YANO
Thanks for the reply. I do have it hooked to a known good source in that the computer that is currently driving it was just fine on the previous monitor. We swapped the monitor with another computer because the good one wasn't being used as often as the streaky one, and the problem went with the monitor, not stayed with the video card. I checked to see if that monitor had more than one input, and it does not. The cable is hard wired so I can't even try another cable.
I'm curious, though. If the issue is ringing as you describe, why would the streaks only show up to the right of objects, rather than to both sides of everything?
WT
You may have some defective electrolytics in the power supply for the three video amplifiers that drive the CRT.
"Wayne Tiffany" wrote in news:4631e585$0$16350$ snipped-for-privacy@free.teranews.com:
because the CRT beam sweeps from left to right.
A sudden change in brightness produces a ringing AFTER the change
|-------|||||---
To the left would be before the change.
Ahhh, didn't think about the beam direction. Thanks.
WT
Your question is analog to "Why, when I take a photo of a fast car, does the blur only appear *after* the car and not before?". Or, "When I strike a bell with a hammer, why do I not hear anything before I strike it?".
Ringing is the undesired result of an event continuing after it should have terminated.
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