when car is started and put in reverse backup camera displays video feed to HU just fine
however, after 20-40 min drive when I try to park and switch to reverse I got black screen with HU warning ... mirrored ...
if I turn off engine and wait for a min or two and turn car to ON or start engine I get video feed on HU just fine
I tried to disconnect backup camera when I got black screen (car with engine ON after parking against curb and switch in reverse position) and connect video camera / camcorder input to backup camera output and camcorder shows video just file. so, looks like backup camera works Ok and something within HU.
Originally I thought that it's backup camera and got another camera and even added voltage regulator as I thought camera might not take over 12V - so it isn't the case.
backup camera takes power from backup lights
camera is connected over rca cable to HU
HU gets +12 from reverse light to reverse detection wire (I think it's magenta, has label for reverse)
HU is set for polarity as battery
How I can fix this annoying issue?