How can this be fixed,ive tryed changing ribbon and all the sensors but errer persists

No idea...

Hi there. Thank you for reaching out and we're sorry for the trouble that this has caused. I'm afraid that you may consider sending the unit in for a proper diagnosis.  You can contact our support team to start up a ticket at https://www.dji.com/support . Also, the warranty can be applied depending on the outcome of the damage assessment including the warranty period of your unit. Thank you for your understanding and support.

The ribbon?  Is this a drone or a typewriter?  What part is this?

have same error on drone for repair... was changed two bottom board with all sensors, but error still appears.
how to calibrate vision sensors ?