Eos Ti external monitor issue

I'm having an issue with the external monitors on my Eos Ti.

I noticed that the touch calibration was off on one of the monitors, so I ran the calibration utility in the shell. When I get to one of the external monitors, I'm able to tap & drag from the first target (upper left hand corner), but when I try to do the next target (lower right hand corner), I get a high pitched beep from the console & the utility doesn't acknowledge the input. The high pitch beep is different than the lower pitched confirmation beep.

This is happening, exactly the same, on all 3 of my external monitors. Any ideas??

My console is an Eos Ti running 3.0.2. The external monitors are 3 matching Elo 2201Ls. They're pretty old, but I haven't had any problems with them before. Plus, there's the fact that they're all acting up identically.

Thanks for any help you can provide.
Jeff

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