I was working on a project to make a quadrocopter with my arduino. I had just established a solid connection to the RC receiver, and managed to get the motor to react to it. Arduino uno fully functionable. I disconnected the usb cable, and the battery for the motor, and when I came back I couldn't upload any script to the arduino. Upon further investigation the arduino didn't show up in device management. The "on"led is on, as is the L led. I have tried multiple cables, and a macbook but no succes however. I have tried some solutions I found, but those didn't work.