15 Sep
2013
15 Sep
'13
3:19 p.m.
>I have a BC18Z I have for connecting the
VAXstation to the monitor, keyboard
>and mouse. With this cable, a red hue across the whole screen flashes on and
>off about once a second, the other colours are fine and the screen is
>legible. There is also a thin dark line that scrolls up the screen
>continuously. This happens on two different monitors. I don't think it is
>the VAXstation itself either, because swapping with another cable the
>problem goes away.
On Sun, 15 Sep 2013, Peter Coghlan wrote:
Me too!
I have a VAXstation monitor cable that does that too or something very
like it.
Would that be an issue that DC/continuity checking does not reveal
problems at higher frequencies, such as inductive coupling between wires,
etc.?
I tested continuity of the red wire and it seems
fine. Are there any
components in the keyboard and mouse connector block that could cause this?
It's been a while since I looked at the problem and I don't know where the
cable is now. I think I did a DC comparison between the bad cable and a
working cable and failed to find any difference.
Unfortunately, the only solution I could come up with was the same one you did,
use a different cable :-(