I asked this a few times in the past, but never got resolution.
Our 2007 PC's back-up camera includes sound. When my wife stands behind our PC while I am backing-up, she provided verbal instruction as well as hand gestures.
Some years ago the sound suddenly stopped working. I determined the unit up front works fine. The problem seems to be in the back where the microphone is. I studied the camera in-back but never found the microphone. I looked for a tiny pin-hole hoping for a simple solution, thinking that dirt or bugs plugged the hole for the mic. I can't find where the sound pick-up is in back to inspect it.
Our system is a 2007 "Zone Defense". I looked in our manuals, on-line, and asked the factory about the mic but never got anywhere.
Does anyone here know much about this brand and model year back-up camera and have solved a problem with the sound? I always appreciated the sound feature and would like to get it working again.