i am new to arduino, bought an Arduino Uno before one month, but now iam getting an error while i upload a sketch

“avrdude: stk500_getsync(): not in sync: resp=0x00”

i checked on the web, based on that i checked the port and board options in the Arduino IDE , but there is no problem with that
what can i do, please help me?

Worked your Arduino before? If yes, could destroy it a recent experiment?

Also try another computer, another USB cable, another USB port. If it still does not work, probably is damaged or erased the Atmega 16U2 chip.

Note: change topic name to "Error: "avrdude: stk500_getsync(): not in sync: resp=0x00" for better orientation