I don’t know if this applies to just my machine but be careful when plugging in your Bitrunner. Mine was an extremely tight fit with the male connector and the male connector was already a little wobbly on the PWB. My Bitrunner didn’t work after I plugged it in and after some looking around there was a broken solder joint on one of the pins. A video showing what it looks like is here.
I also had another tough connection when I was unplugging everything that pulled an additional solder joint out. When I was plugging things in initially I do remember that some of the connections were very tight installs.
Take it slow if the connection is tight!