I'm learning Arduino with a starter pack (Sunfounder UNO board). I follow the lessons to learn the programming and components.
Up until last week everything went without problems. When I tried a new lesson I got the message "programmer is not responding" when uploading a new sketch. Even when I tried to upload a simple led sketch, it didn't work. I checked eveything: the board was choosen correct, I tried other ports in the IDE, I tried other USB ports and other USB cable on the computer,... nothing helped. I even tried another computer. It also didn't work.
At last I bought a new board. At first I tried a simple "led sketch" --> no problem Then I tried the same lesson when the problems started --> no problem I tried the old board again --> same problem again
So, I suppose the problem is the board? But what is/was the problem? Just a fault in the board? Or did I do something wrong with the last project? Some shortcut or something?