Monitor display off center

I have a Samsung HD monitor that serves my desktop and laptop computers via an A/B switch. This setup has been working correctly for a couple of years. I use the recommended 1920 X 1080 resolution for both computers.

This morning the laptop screen is displaying correctly on the monitor, but the desktop's screen is offset about 2" to the right and shifted downward so the taskbar is not visible.

I have rebooted a couple of times with no success. I have tried adjusting the screen resolution on the desktop machine, and many resolutions fill the monitor screen correctly (but are either too coarse or distorted to use comfortably).

Does anybody know what could be causing this? The issue must be with the desktop machine, because the monitor is working fine with the laptop using the same resolution setting.
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Try adjusting he resolution directly on the display, not the PC. Usually you have an auto adjust option.

If that doesn't help, connect the display directly to the PC, not via switch box. Switch boxes often cause this issue. Besides, most displays have more than 1 input, but rather include a VGA, DVI and sometimes also an HDMI input. So a switch box normally isn't even needed.

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dgmoore1Author Commented:
Adjusting the display directly didn't work, but disconnecting the KVM switch and rebooting everything did the trick.
dgmoore1Author Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for dgmoore1's comment #a39562626

for the following reason:

rindi's suggestions were helpful, but in my case disconnecting everything and restarting fixed the problem.
I did mention that you should connect the display directly to  the PC, which has the same effect as disconnecting the KVM switch.
dgmoore1Author Commented:
OK - acknowledged. Thanks
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Displays / Monitors

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