Hey guys, my blackvue 550 has served me well for the last 2 years...however, yesterday I noticed the LED light on my rear camera was flickering on/off. Then, it was fine this morning. However, tonight, the LED has gone off and the rear camera is now dead. I unplugged the cables and replugged but rear camera is still not functioning. How to I determine if it is due to a faulty cable or if the rear camera itself has died??? Thank you!