![Arduino UNO not working; Arduino: avrdude: ser_open(): can't open device "\\.\COM4": The system cannot find the file specified. . I haI have also changed the COM Port in windows like the YT tutorial suggests but that doesn't work either. Have i ruined the ... Arduino UNO not working; Arduino: avrdude: ser_open(): can't open device "\\.\COM4": The system cannot find the file specified. . I haI have also changed the COM Port in windows like the YT tutorial suggests but that doesn't work either. Have i ruined the ...](https://i.redd.it/arduino-uno-not-working-arduino-avrdude-ser-open-cant-open-v0-lpr1a6rub2j91.png?width=490&format=png&auto=webp&s=2e2c2049364bae950197b9c4a210cb091fd786dd)
Arduino UNO not working; Arduino: avrdude: ser_open(): can't open device "\\.\COM4": The system cannot find the file specified. . I haI have also changed the COM Port in windows like the YT tutorial suggests but that doesn't work either. Have i ruined the ...
PICKit 2: MSVC build of avrdude Windows binary does not work · Issue #1006 · avrdudes/avrdude · GitHub
![Win 11 avrdude: ser_open(): can't set com-state for "\\.\COM4" - Avrdude, stk500, Bootloader issues - Arduino Forum Win 11 avrdude: ser_open(): can't set com-state for "\\.\COM4" - Avrdude, stk500, Bootloader issues - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/8/a/a/8aae3f85a220fe2a368892a3ebf0d19df20e199f.png)
Win 11 avrdude: ser_open(): can't set com-state for "\\.\COM4" - Avrdude, stk500, Bootloader issues - Arduino Forum
![AVRDude Tutorial : Burning hex files on Atmel AVR using USBasp and AVRdude – Embedded Electronics Blog AVRDude Tutorial : Burning hex files on Atmel AVR using USBasp and AVRdude – Embedded Electronics Blog](http://elecrom.files.wordpress.com/2009/04/fig3pgmdone.png?w=1200)