I'm trying to calibrate the sensors and get to the finishing screen where it states calculating and it just sits at zero% . Never moves.  I re-try and same thing.  Any help would be great.  Thanks

Try to clean all sensors with a wool, you may even don't need calibration, so check the drone after cleaning.

Here DJI recommendation.

For calibrating the vision sensor, Please follow this recommended screen resolution settings:
It is advisable to use a 14", 17", 19",  22" and 24" monitors to calibrate the vision system.
Set the display’s resolution to the recommended default value. (Usually, the 14-inch display’s resolution should be set at 1366*768 or 1440*900. The 17-inch display’s resolution: 1366*768 or 1280*720. The 19-inch display’s resolution: 1366*768 or 1440*900. The 22-inch display’s resolution: 1680*1050 or 1920*1080. The 24-inch display’s resolution: 1920*1080 or 1920*1200.).

Hi, thank you for reaching out and we do apologize for the inconvenience. Can you please try to clean the vision sensor with a clean cloth to see if the problem persists? Also, a display that’s 14 inches or bigger is recommended for the calibration. Set the display’s resolution to the recommended default value. (Usually, the 14-inch display’s resolution should be set at 1366*768 or 1440*900. The 17-inch display’s resolution: 1366*768 or 1280*720. The 19-inch display’s resolution: 1366*768 or 1440*900. The 22-inch display’s resolution: 1680*1050 or 1920*1080. The 24-inch display’s resolution: 1920*1080 or 1920*1200). If the problem persists, kindly please restart the PC and aircraft multiple times. In addition, please make sure that you are using the latest version of the DJI Assistant 2 to avoid any errors. Please keep us posted. Thank you for your understanding and support!

DJI Gamora Posted at 2-13 10:02
Hi, thank you for reaching out and we do apologize for the inconvenience. Can you please try to clean the vision sensor with a clean cloth to see if the problem persists? Also, a display that’s 14 inches or bigger is recommended for the calibration. Set the display’s resolution to the recommended default value. (Usually, the 14-inch display’s resolution should be set at 1366*768 or 1440*900. The 17-inch display’s resolution: 1366*768 or 1280*720. The 19-inch display’s resolution: 1366*768 or 1440*900. The 22-inch display’s resolution: 1680*1050 or 1920*1080. The 24-inch display’s resolution: 1920*1080 or 1920*1200). If the problem persists, kindly please restart the PC and aircraft multiple times. In addition, please make sure that you are using the latest version of the DJI Assistant 2 to avoid any errors. Please keep us posted. Thank you for your understanding and support!

Thanks for your reply.  I have done all the above more than three times , each time same results.  The calibration finish but the calculation refuses to go past 0 percent%. When using the senors it shows side sensors are not working, yet when I go thru the calibration process I get nothing but a big fat Zero%

I usually take of the props. Before i callibrated with props on , somehow it failed a lot. When i take them of , it always  callibrated successfull. Maybe this works for you aswell

dronie1965 Posted at 2-13 12:19
I usually take of the props. Before i callibrated with props on , somehow it failed a lot. When i take them of , it always  callibrated successfull. Maybe this works for you aswell

Thank you but also tried that.  I'll take it to work Saturday and try it on a mac.  This really sucks.

Thank you for the input.

DJI Gamora Posted at 2-13 10:02
Hi, thank you for reaching out and we do apologize for the inconvenience. Can you please try to clean the vision sensor with a clean cloth to see if the problem persists? Also, a display that’s 14 inches or bigger is recommended for the calibration. Set the display’s resolution to the recommended default value. (Usually, the 14-inch display’s resolution should be set at 1366*768 or 1440*900. The 17-inch display’s resolution: 1366*768 or 1280*720. The 19-inch display’s resolution: 1366*768 or 1440*900. The 22-inch display’s resolution: 1680*1050 or 1920*1080. The 24-inch display’s resolution: 1920*1080 or 1920*1200). If the problem persists, kindly please restart the PC and aircraft multiple times. In addition, please make sure that you are using the latest version of the DJI Assistant 2 to avoid any errors. Please keep us posted. Thank you for your understanding and support!

Made sure to try both options with the 22" monitor settings, same results, cleaned the sensors , removed the blades and tried several times to no avail.

fans6c392738 Posted at 2-13 11:13
Thanks for your reply.  I have done all the above more than three times , each time same results.  The calibration finish but the calculation refuses to go past 0 percent%. When using the senors it shows side sensors are not working, yet when I go thru the calibration process I get nothing but a big fat Zero%

Hi, thank you for keeping us update. Since you've managed to exhaust the troubleshooting steps that could possibly rectify the problem on your drone, however, it seems that the problem persists, we highly recommend sending the unit into our repair facility for further evaluation. You may refer to the link below. Thank you for your kind and understanding.

https://www.dji.com/support