ANY HELP WOULD BE APPRECIATED.. I HAVE BEEN UN SUCCESSFULL AT CALIBRATING MY SENSORS VIA THE DJI ASSISTANT. IT SIMPLY WILL NOT LOCK ONTO THE TARGET ON MY COMPUTER SCREEN NO MATTER HOW I MOVE IT , HOW CLOSE ARE FAR AWAY IT IS .. I CAN CALIBRATE THE FRONT SENSOR BUT THE BOTTOM SENSORS WILL NOT CALIBRATE. I AM GETTING A OPTICAL AVOIDANCE WARNING ON MY DJI GO 4 APP WHEN FLYING AND SAYS OPTICAL AVOIDANCE MAY NOT WORK AND TO CALIBRATE VUA THE DJI ASSISTANT. ONCE I WAS ABLE TO GET THROUGH ALL THE CALIBRATIONS BUT IT SAT AND UPDATED AY 0% FOR AN HOUR AND NEVER UPDATED ... ALSO HAD WEIRD SITUATION WHERE WHEN TAKING OFF IT SAYS FLIGHT ALTITUDE REACHED AT ABOUT 15 FEET AND ITS SET FOR 400 FEET. I LAND AND REBOOT CONTROLLLER AND DRONE AND IT WORKS FINE. ANY HELP GETTING MY SENSORS TO CALIBRATE WOULD BE HELPFULL

Hello there dave777. I am sorry for the trouble and thank you for reaching out. You may give a try to change the resolution of your screen for your reference you may take a look at this information. It is recommended to use a monitor with a size of 14 inches or more, and a curved screen is not supposed to be used. Set the display resolution to the recommended value (usually 14 inches for 1366*768 or 1440*900; 17 inches for 1366*768 or 1280*720; 19 inches for 1366*768 or 1440*900; 22 inches for 1680) *1050 or 1920*1080; 24 inches for 1920*1080 or 1920*1200). Thank you.