i have 3 arduinos , 2 arduino uno and 1 Arduino mega . with my old computer i used to be able to program them well without problems and everything used to go just fine . i recently acquired a new computer . i installed the IDE and everything went well . but when i upload code on the Arduino , it runs abnormally . the code uploads just fine but then the output is abnormal .
here is an example with an Arduino mega :
this is the test code :
this is get during upload which is normal :
then this is the output : it prints "he" then prints "h" forever until i shut it down , which is abnormal