This might help someone else. I have some Elegoo Nano's which I quite like (nicely made, cheap) despite always advocating buying the real thing. Cheap because it has CH340 chip, not FTDI. All has been well until today, when none of them would upload sketches. Went through the whole lot, checking …

Problems uploading sketches to Elegoo Nano with CH340 chip [SOLVED]

Topic		Replies	Views
CH340 drivers - LINUX SOLUTION IDE 1.x	14	56580	May 5, 2021
Clone Arduino Nano V3 - CH340 can't upload any sketch Uploading	7	3243	May 6, 2021
Can't upload to Nano - please help. IDE 1.x	15	4360	May 6, 2021
Brand new Arduino Nano will not upload Uploading	18	16087	May 6, 2021
1 nano out of 11 uploads IDE 1.x	9	781	May 5, 2021