Thanks for the suggestions.? Yesterday, I finally got in via SSH and edited /boot/config.txt as suggested.? No joy.? I re-verified no HDMI output by connecting a working monitor/cable from this PC.? Seems the HDMI components have failed.? The Pi may still be useful standalone, but I have no need for that.?? It's hard to imagine what occurred; one morning, it just failed.? Thanks for the help.? Maybe time for Rpi4.? Doug K7KY?