Can't upload sketch to my Arduino Nano

Hi all,

I need some help to fix this issue, I can not longer upload sketches to my Arduino Nano. Here is the upload log:

Sketch uses 930 bytes (3%) of program storage space. Maximum is 30720 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avrdude -C/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf -v -patmega328p -carduino -P/dev/cu.wchusbserial141420 -b115200 -D -Uflash:w:/var/folders/d7/nqlhz82s4jj0b582yjwc3qfh0000gn/T/arduino_build_62822/Blink.ino.hex:i

avrdude: Version 6.3-20171130
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is “/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf”
User configuration file is “/Users/laurent/.avrduderc”
User configuration file does not exist or is not a regular file, skipping

Using Port : /dev/cu.wchusbserial141420
Using Programmer : arduino
Overriding Baud Rate : 115200
AVR Part : ATmega328P
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PC2
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :

Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack


eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff
flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00

Programmer Type : Arduino
Description : Arduino
Hardware Version: 3
Firmware Version: 4.4
Vtarget : 0.3 V
Varef : 0.3 V
Oscillator : 28.800 kHz
SCK period : 3.3 us

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0x1e950f (probably m328p)
avrdude: reading input file “/var/folders/d7/nqlhz82s4jj0b582yjwc3qfh0000gn/T/arduino_build_62822/Blink.ino.hex”
avrdude: writing flash (930 bytes):

Writing | ################################################## | 100% 0.49s

avrdude: 930 bytes of flash written
avrdude: verifying flash memory against /var/folders/d7/nqlhz82s4jj0b582yjwc3qfh0000gn/T/arduino_build_62822/Blink.ino.hex:
avrdude: load data flash data from input file /var/folders/d7/nqlhz82s4jj0b582yjwc3qfh0000gn/T/arduino_build_62822/Blink.ino.hex:
avrdude: input file /var/folders/d7/nqlhz82s4jj0b582yjwc3qfh0000gn/T/arduino_build_62822/Blink.ino.hex contains 930 bytes
avrdude: reading on-chip flash data:

Reading | #####################################An error occurred while uploading the sketch
############# | 100% 0.45s

avrdude: verifying …
avrdude: verification error, first mismatch at byte 0x0000
0xff != 0x0c
avrdude: verification error; content mismatch

avrdude done. Thank you.

Thank you for your help.

Capture d’écran 2019-08-26 à 18.50.45.png

picture of nano board Look for "Arduino AVR Boards", select the last version (1.6.23) Does your LED goes on and off when pressing reset button ??