@cluckj , @scottleibrand So, I tried the "blind logging in" thing, and something weird happened: When the rig first boots up, there are all the Raspian messages showing on the monitor. Then, when the openAPS cron starts (judging by the appearance of the graph on the rig screen), the monitor goes blank and its power light switches from green to orange for "standby". Then I (blindly) entered "root", my password, then "tvservice -p". The monitor light turned green again -- as in, it thinks it has a signal coming to it, so that clearly did something (?) -- but nothing actually shows up. Does that make any sense to you guys? How could I have changed anything with the tvservice command without that resulting in getting actual display output?