Arduino Uno: Byte mismatch

Hi, Thanks for responding, sorry about the late reaction, but today was the first chance I got to continue working on my project. What exactly do you mean by a monitor? The chip I have is the standard Arduino UNO. Is it possible the ATmega328 chip needs to be replaced?

When trying to upload the blink sketch I receive the verbose error I attached.

error.txt (25.1 KB)