lane@dalcs.UUCP (John Wright/Dr. Pat Lane) (10/18/88)
This is a problem I'm having on a portable XT clone with a herc-clone video
adapter and a built-in ttl-level monitor. It goes like this. A short
diagonal line appears to "float" behind the regular text on the screen.
The line varys in length and appears to follow the track of the vertical
retrace lines (I think thats what they are... the 7 or so lines you can
see going diagonally accross the screen if you turn the brightness up all
the way) but is the same intensity as the characters. The line usually
floats on and off the screen in the lower right corner. It does *not*
follow the regular pixel pattern and appears while the screen is in text
mode.
That's when things are relatively well behaved. Sometimes these lines appear
all over the screen and the screen begins to roll vertically in an unstable
fashion. The severity of the problem is not related to how long the system
has been on. Sometimes it behaves very badly after being on for a short time
while other times it can be on for hours with no trouble.
I'm amazed that the electronics can produce such an effect (not that I'm an
expert). Can anyone give me some clues as to what I'm dealing with here?
Many thanks.
--
John Wright ///////////////// Phone: 902-424-3805 or 902-424-6527
Post: c/o Dr Pat Lane, Biology Dept, Dalhousie U, Halifax N.S., CANADA B3H-4H8
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