Hi allyn5157,
- Does this happen with any particular screensaver or is it the same with all the screen savers?
Method 1:
Duplicate the display settings and check if you can view the Screensaver in the extended monitor as well.
To change your display settings to extended
a. Open Screen Resolution by clicking the Start button, clicking Control Panel, and then, under Appearance and Personalization, clicking Adjust screen resolution.
b. Click the drop-down list next to multiple displays, click Duplicate these display, and then click OK.
The Multiple displays option appears only when Windows detects more than one monitor connected to your PC.
For further information, refer the link:
Move windows between multiple monitors
http://windows.microsoft.com/en-US/windows7/Move-windows-between-multiple-monitors
Method 2:
I would suggest you to check the display resolution set for both monitors. Make sure the screen resolution is the same on each display.
For more information, see: Getting the best display on your monitor
http://windows.microsoft.com/en-us/windows7/Getting-the-best-display-on-your-monitor
Hope this information is helpful.