I am new in the FPGA domain and also PYNQ. I have a PYNQ-Z2 board. While I am connecting the board with PC using USB cable, hardware manager shows that it is not connected. Is it mandatory to install image for connecting to hardware manager/PC? I have in the tutorial that it is required. But, one of my friends says that it is not required which makes me confusing. Can you please guide me and give me some tutorials for starting?