Are you turning on the AC when you are connecting to Dji Assistant 2.?
If you have, then it’s a problem with drivers, to fix that I uninstalled the latest version and installed an older version of Dji Assistant 2 to install the relevant drivers. This version is 1.0.7
Dropbox - DJI+Assistant+2+1.0.7.exe
Then I reinstalled the latest version again
Cheers
I'll give it a shot tomorrow when I get home, if that doesn't work I'll take it back to the store for replacement.