noring@vaxr.llnl.gov (11/20/90)
I am presently experiencing difficulties in getting my pc to correctly
display 1024x768 non-interlaced (both 16 and 256 colors). What happens
is that the image is "snowy", that is, there's a lot of the pixels that
are blinking on and off (I don't know the percentage doing this, but
it doesn't take many to make the picture look bad). I don't have any
problems if I run the system in interlaced mode (done simply by toggling
a switch on the video board), or if I run at a resolution of 800x600
or lower (either interlaced or non-interlaced). Here's a detailed
description of the components:
Mother board: Omnitel 386-33
Video board : Orchid Pro-Designer II with 1 Mb.
Monitor : Sony (I don't remember the number (?1304), but it's the new
one that is capable of 1024x768 non-interlaced operation).
The applications where I've experienced this occurence are FRACTINT 14.0
and CSHOW (displaying 1024x768x256 GIF's). I run Windows 3.0 at 1024x768,
but I just realized that I haven't tested this problem in Windows.
What I've tried so far (based on recommendations by technicians at Orchid
and Omnitel) are:
1) Replaced the Orchid video board. Nothing changed.
2) Moved the Orchid video board from a 16 bit slot to an 8 bit slot,
nothing changed (the technician at Orchid interpreted this to mean
that the problem is not in the video board, but is probably in the
mother board or maybe even the monitor).
What I haven't yet tried:
1) A different monitor.
2) A different motherboard.
Any suggestions? Is there an inherent incompatibility between these
components? Thank you.
Jon Noringburger@oldcolo.UUCP (Keith Hamburger) (12/07/90)
Jon, I had a problem once with an Orchid board similar to the one you are referring to. Thepicture would be "snowy" in some modes (same monitor as well most likely only packaged with a Seiko name on it). The techs at Orchid ask me to look at the board and see if there was a resistor mounted on the back. When I told them there was they had me remove it and that solved the whole problem. I AM NOT SAYING THAT THIS IS WHAT YOU SHOULD DO. I SUGGEST YOU CALL ORCHID IF YOU SUSPECT YOUR PROBLEM MAY BE SIMILAR AND DISCUSS IT FURTHER WITH THEM. ANY ACTIONS TAKEN BASED ON THIS MESSAGE ARE AT YOUR OWN RISK. etc. etc. etc. Seems that the problem was common in some older boards (this happened to me well over a year ago). Keith Hamburger