I bought the dvd player in the Subject. It has two sockets called A/V in/out and coaxial. the take what looks like the same plug. I can take the RCA 3 plug to a single plug and put it in either socket. If I do this with my Panasonic dvd player I cannot see any image on the portable's screen. I do this to checkout the Panasonic, which has TV to connect it to. What's the difference between the two sockets, and particularly what is coax really about? A socket that's both in and out?
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