More detail, when I exit ES using F4, the Pi is still up, I can SSH in, Http Manager works, Samba shares all work. I can use Manager to start emulationstation again. I just can't get a terminal on my composite display. I tried plugging my HDMI display to the Pi and there's no terminal there (or anything) either.
Previously, it would stay on the splash screen when I exited emulationstation, so I disabled the splash screen. Now I see a blank screen. I do see some ouput on my display when I perform the procedure ALT-PRINT SCREEN - R-E-I-S-U-B
I have followed the instructions here:
https://wiki.recalbox.com/en/tutorials/system/access/root-access-terminal-cli
along with all permutations and variations and incantations thereof.
F4 then Alt-F2
Alt-F2 then F4
Alt-F4 then Alt-F2
Alt-F2 then Alt-F4
Ctl-Alt-F4 then Alt-F2
Ctl-Alt-F2 then Alt-F4
Ctl-Alt-F4 then F2
Ctl-Alt-F2 then F4
Alt-F2 then Ctl-Alt-F4
Alt-F4 then Ctl-Alt-F2
F2 then Ctl-Alt-F4
F4 then Ctl-Alt-F2
Ctl-Alt-F2 then Ctl-Alt-F4
Ctl-Alt-F4 then Ctl-Alt-F2