(getting back to the real matter, rather than what is probably an equally pointless diversion....)[quote="kaiswim1, post:1, topic:922167"]
Is there a way to allow my program print to the serial monitor even while the Arduino is powered by just a 9V battery?
You might elaborate with some cogent reason as to why you would want to do this, particularly if, by 9v battery, you mean a 9v PP3 battery, as this is about the worst possible choice you can make for powering a Uno. The kindest that that can be said about that is, if the laptop is not up to the job, a 9v battery is not a solution. In the world that is enjoyed by everybody else, your Uno is happy about being connected to more than one source of power, and simply takes whatever is most suitable, without any need for fartarsing about by the user. Indeed, since you had the monitor working before, the latter is probably the best explanation of the message "Board at COM3 not available"