[Latitude 28]

I am going to tell on myself....on the last trip our camera went from working great to all of sudden it quit....just a plain grey screen.  So the next couple of days spent some time thinking of what kind of system I wanted to install.  While troubleshooting I pressed the input A/B button.....viola the camera works great on input A but there is nothing on Input B.  Apparently I had pressed the input button at some point and didn't realize it. 

I would like to upgrade at some point so a couple of questions.  Can the original cable be used?  Has the wireless technology progressed to be a reliable option?

Thank you in advance.
Steve