Code upload errors

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can help?

arduino: 1.8.2 (windows 10), board: "arduino/genuino mega or mega 2560, atmega2560 (mega 2560)"

sketch uses 120266 bytes (47%) of program storage space. maximum 253952 bytes.
global variables use 6136 bytes (74%) of dynamic memory, leaving 2056 bytes local variables. maximum 8192 bytes.
avrdude: verification error, first mismatch @ byte 0x023b
         0x5f != 0x4f
avrdude: verification error; content mismatch
avrdude: verification error; content mismatch

this report have more information with
"show verbose output during compilation"
option enabled in file -> preferences.

do exact same error every time try upload?  if so, seems flash memory ('program storage space') maybe broken.

quote
this report have more information with
"show verbose output during compilation"
option enabled in file -> preferences.
sounds reasonable thing try.  maybe additional information provide clue.


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