Im korean student and I have some hardware problem. I connected my arduino leonardo but computer couldnt notice that and Leonardo's L led was just blinking. what can i do? I have an important project in my school with this leonardo so I have to fix that as quickly as possible. plz anyone help me ㅜㅜ
CreamB_:
I connected my arduino leonardo but computer couldnt notice that
Please provide some more details of what you mean by "couldnt notice that".
A common cause of this sort of issue is using a charge-only or defective USB cable that provides power but doesn't have the data lines connected. Verify your USB cable works for data on another device.
usb cable doesnt have problem. and I can find leonardo at device manager for a moment after connect. but it disappear a little later. and no matter what I did, I couldn't find Leonardo at ide
Double click the reset button. This should put the Leonardo into upload mode.