I bought 4 ARLO kits with propeller activity boards, All related drivers were installed in PC and Activity boards were tested as follows:
1st: connected to PC via USB and downloaded No surprises program.c Board worked fine
2nd: connected to PC via USB, no LED glowed, so I have given DC supply through barrel jack connector.(Arlo ). Bad odour has come from the onboard serial connector
3rd: connected to PC via USB, power LED glows, but related COM port was not detected in PC to download Nosurprises.c program
4th: connected to PC via USB , no power LED glows.
I am stuck . can anyone help