After leaving the car alone for a month, I noted the reverse camera does not produce an image on anymore. You can check it on or off when you put the car in reverse but the brightness is 0, contrast is 0, and you cannot change it. Nor do the guide lines appear.

All the sensors are good. I tested them all. But with my Autophix 7910 I have been reading E21F and E220 codes in the PDC section consistently though Autophix has no explanation for those codes.

I hope it is a loose connector somewhere, or is there a fuse I need to check? I read about reseting the Nav unit, did it, but it didn't help.