USB serial port not working

Hello TS-Russell, Thank-you for the response. Things are getting strange. When I loaded the ch340 driver I got a message “no device found” I had searched the DEV-16829 MicroMod Data Logging Carrier board for a ‘CH340’ IC and did not find one, so I assumed the driver was handled in another manner. Then I tried to install the driver on the 'SparkFun Artemis MicroMod board and got the message 'NO BOARDS FOUND FOR “SPARKFUN ARTEMIS MICROMOD”. The board I has selected was 'SparkFun Qwiic Scale and that is shown as installed on the Arduino IDE. Is this DEV-16829 a new board?

Thanks, Mick, 80yo retired EE