Hello!
After connecting my Leonardo to the PC, everything worked well. My board appeared in the device manager and I've been working with it for some time. Suddenly, I couldn't upload a new sketch and I saw that my PC stopped detecting the board and I can't find it in the device manager any longer. Only when I press the reset button the bootloader appears for some seconds in the device manager.
The lamps on the board are still turned on. I tried the board on another PC and with another USB cable but without results. I uninstalled and reinstalled the Arduino Software once again but nothing changed. There isn't anything plugged in.
Do you have any idea what else could I try to solve this problem?
Thanks for your help!
Is there any chance you damaged it doing your projects?
I don't think so. I didn't change anything and it stopped working when I wanted to upload a new sketch.
Press the reset button just before you choose upload. If your OS can see the bootloader the sketch will upload. The Leonardo needs to be programmed as a serial device to show as a serial port.