Chuck,
Your monitor's horizontal sweep is non-linear, i.e. the current waveform
which causes the electron beam to travel horizontally across the screen
does not rise steadily for each line of the picture, but rises faster in
the middle than at the beginning and end. This is a problem with the
monitor, not the display adapter. It may be adjustable (see e.g.
http://www.pcsupportadvisor.com/Troubleshooting_monitor_problems_page2.htm
) but unless you can find the horizontal linearity control from the
outside (not likely) it is not something you should attempt doing
yourself. Opening your monitor would expose you to a high risk of
getting zapped with 25000 volts and/or mains voltage. If you think it is
worth the money, get a TV repairperson or a PC repairperson to look at
it. Or get an LCD monitor.
Jonas
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