I tried a different cable, and every USB port on my computer with no success. I went through the “what to do if your duet won’t respond” guide on the website too. I didn’t have a different computer to use but it’s possible that would’ve fixed the problem. After rebooting the computer multiple times and rebooting the duet multiple times, it did eventually get a connection and I was able to reflash the firmware. Not sure why though.
