I've plugged in a new UNO+ and tried to upload Blink to it. It won't upload.
I have another UNO+ which uploads fine.
Any thought on what could be the problem?
here's a copy of the error messages, coloured as per the output.
Arduino: 1.8.13 (Mac OS X), Board: "Arduino Uno"
/Applications/Arduino.app/Contents/Java/arduino-builder -dump-prefs -logger=machine -hardware /Applications/Arduino.app/Contents/Java/hardware -tools /Applications/Arduino.app/Contents/Java/tools-builder -tools /Applications/Arduino.app/Contents/Java/hardware/tools/avr -built-in-libraries /Applications/Arduino.app/Contents/Java/libraries -libraries /Users/Chris/Documents/Arduino/libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10813 -build-path /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532 -warnings=all -build-cache /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_cache_614474 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avr-gcc.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avrdude.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -verbose /Applications/Arduino.app/Contents/Java/examples/01.Basics/Blink/Blink.ino
/Applications/Arduino.app/Contents/Java/arduino-builder -compile -logger=machine -hardware /Applications/Arduino.app/Contents/Java/hardware -tools /Applications/Arduino.app/Contents/Java/tools-builder -tools /Applications/Arduino.app/Contents/Java/hardware/tools/avr -built-in-libraries /Applications/Arduino.app/Contents/Java/libraries -libraries /Users/Chris/Documents/Arduino/libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10813 -build-path /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532 -warnings=all -build-cache /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_cache_614474 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avr-gcc.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avrdude.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -verbose /Applications/Arduino.app/Contents/Java/examples/01.Basics/Blink/Blink.ino
Using board 'uno' from platform in folder: /Applications/Arduino.app/Contents/Java/hardware/arduino/avr
Using core 'arduino' from platform in folder: /Applications/Arduino.app/Contents/Java/hardware/arduino/avr
Detecting libraries used...
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10813 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR -I/Applications/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino -I/Applications/Arduino.app/Contents/Java/hardware/arduino/avr/variants/standard /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/sketch/Blink.ino.cpp -o /dev/null -DARDUINO_LIB_DISCOVERY_PHASE
Generating function prototypes...
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10813 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR -I/Applications/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino -I/Applications/Arduino.app/Contents/Java/hardware/arduino/avr/variants/standard /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/sketch/Blink.ino.cpp -o /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/preproc/ctags_target_for_gcc_minus_e.cpp -DARDUINO_LIB_DISCOVERY_PHASE
/Applications/Arduino.app/Contents/Java/tools-builder/ctags/5.8-arduino11/ctags -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/preproc/ctags_target_for_gcc_minus_e.cpp
Compiling sketch...
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-g++ -c -g -Os -Wall -Wextra -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10813 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR -I/Applications/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino -I/Applications/Arduino.app/Contents/Java/hardware/arduino/avr/variants/standard /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/sketch/Blink.ino.cpp -o /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/sketch/Blink.ino.cpp.o
Compiling libraries...
Compiling core...
Using precompiled core: /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_cache_614474/core/core_arduino_avr_uno_51f02b7210b938436b779d1c032618e1.a
Linking everything together...
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-gcc -Wall -Wextra -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections -mmcu=atmega328p -o /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/Blink.ino.elf /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/sketch/Blink.ino.cpp.o /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/../arduino_cache_614474/core/core_arduino_avr_uno_51f02b7210b938436b779d1c032618e1.a -L/var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532 -lm
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-objcopy -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/Blink.ino.elf /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/Blink.ino.eep
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-objcopy -O ihex -R .eeprom /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/Blink.ino.elf /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/Blink.ino.hex
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avr-size -A /var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/Blink.ino.elf
Sketch uses 924 bytes (2%) of program storage space. Maximum is 32256 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.wchusbserial1430 -b115200 -D -Uflash:w:/var/folders/9h/y6rm_9v56bx_9vw8q5s6np_m0000gn/T/arduino_build_552532/Blink.ino.hex:i
avrdude: Version 6.3-20190619
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/Chris/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : /dev/cu.wchusbserial1430
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x00
avrdude done. Thank you.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.