Hi all.

Been strugling trying to calibrate vision sensors.

Foward and bottom calibrates at ease but once it gets to the backward sensor the screen is blank.

Can anyone assist please.

Hi, _itsjunaid. Thank you for reaching out. Please try the steps below:

1. Please check the Sensor Calibration Instructions in DJI Assistant 2. During calibration, keep the aircraft arms unfolded. Notes: Folded aircraft arms may obstruct the vision sensor, which may result in a calibration error.
2. Ensure that the monitor uses a straight-face screen. Curved screens are not supported. If the screen used is not a straight-face screen, please change or borrow a straight-face screen for operation.
3. Confirm the dimensions of the monitor being used. We recommend using a monitor larger than 14 inches. If the screen is less than 14 inches, the calibration may fail.
4. Please use a soft fabric (such as a cloth for glasses) to wipe the vision sensor lens of the aircraft. Wipe it several times until the lens is clean.
5. Please set the resolution displayed on the computer to the default value recommended by the system.
6. Open (https://www.dji.com/downloads/products/phantom-4-pro). Find the DJI Assistant compatible to your aircraft on “Downloads” - “Software” - “DJI Assistant 2 Series”. Check whether the DJI Assistant 2 is the latest version. If not, please download and install one.
7. After following the steps above, please reconnect the aircraft and the DJI Assistant 2 for reconnection and calibration.
8. If the issue still persists, please take a screenshot of the DJI sensor calibration failure.