Thanks.

On Outputs tab, the Bus is Steinberg MI4 Stereo Out, with Left being "1 Built-in Audio 1" and Right being "2 Built-in Audio 2" and I have my monitors connected to the "Output" section on the back of the MI4 (R/L).

Also, last time I wrote, "When I look in the Transport Panel, I see in the far right window where it shows L/R signal strength that only the right side has any signal. The left side is dead silent."

Actually, now I see that that two-window box on the far right of the Transport bar are showing input & output channels. Since the Left window is Input and I'm playing back, it apparently shouldn't be doing anything anyway. (Sorry, I'm pretty new to Cubase.)