The other day I bought a Leonardo on Craigslist, and am having trouble connecting it. Here is what happens:
- When I start up Arduino IDE, even with the board plugged in and "Arduino Leonardo" preselected, the "Port" option under "Tools" is greyed out.
- If I then unplug the board and plug it back in, it appears on the list, but disappears again if I try to do anything.
The board itself is visibly on and seems to have some sort of a Fade-type program installed.
I also have an ELEGOO Uno that works just fine.
I am using Arduino IDE 1.9.0 Beta, although it doesn't work with the other version either. My computer is a Toshiba Satellite running Ubuntu 18.04. I've tried with several different USB cables.
Are there some drivers I need to install? Or is it maybe a hardware issue?