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Rod Speed

wrote:
Jon D wrote:

My 17 inch CRT sometimes gets ...

light-colored horizontal lines
a couple of inches above the bottom of the screen
usually just one or two of these
the picture size too *sometimes* seems to get a tiny bit smaller
when these lines are present.

I have tracked this down to the signal lead going from PC to monitor.

This d*mn lead seems quite sensitive because slight kinks and bends
in the lead can create this effect. So can gently moving the plug as
it goes into the video card. Why can't they design a better lead
than this? It is already the most inflexible lead on my whole
system!

MY QUESTION IS ... is this lead usually as sensitive as this or is it
related to the design of my particular monitor and PC interface.

Can I do anything to improve the situation? I have lowered the
screen refresh rate a bit but that doesn't seem to have help.

Is there a "magic bullet" like something to clip onto the leqad or
some screening.

Changing the lead means some tricky messing around inside the monitor
to terminate the leads it in the screened cage sitting on the cathode
parts of the CRT itself.

Any ideas?

Sounds like a flyback problem,

Nope, doesnt explain the sensitivity to the video cable.

but it might just be a poor connection on the sync pulse line.
Prodding should lead you to see where its most sensitive, and
thus where the probelm is. Typically its cable ends or connectors.

The good news is this fault is likely non-fatal. Having retrace lines
scattered over the screen doesnt exactly make it look better, but it
means you can wait to see if it goes bad, and if it does find a monitor then.