board suddenly give me this message (avrdude stk500_getsync not in sync resp 0x00) when upload any program

avrdude stk500_getsync not in sync resp 0x00 for UNO R3

Robohac December 23, 2012, 7:09pm 3

just googled it and found THIS post, maybe it helps you. Seems to be your problem

Topic		Replies	Views
avrdude stk500_getsync (): not in sync: resp=0x00 for UNO R3 IDE 1.x	2	840	May 5, 2021
avrdude: stk500_getsync(): not in sync: resp=0x00 IDE 1.x	2	857	May 5, 2021
avrdude: stk500_getsync(): not in sync: resp=0x00 IDE 1.x	2	922	May 5, 2021
Help :avrdude: stk500_getsync(): not in sync: resp=0x00 IDE 1.x	1	543	May 5, 2021
UNO R3 error avrdude: stk500_getsync(): not in sync: resp=0x00 IDE 1.x	3	1882	May 5, 2021