First off just to clarify things despite the fact that some player might have this port labelled as Audio Out it is in fact an Audio/video port. Now that we have this out of the way like many other people I had some issues when trying to connect the Audio/video port to my TV. I had ground issues; waving picture, sound cutting in and out etc... At the time I assumed that I had a cable with the wrong connector.
I finally decided to look into the matter a little better because of all the other complaint I seen on this forum even though I do not use that output .... I use HDMI. Anyhow once I connected my connector back on with the PBO Alpine open; I noticed that the connector did not seem to go far enough. Upon closer inspection I suspected that the thickness of the PBO Alpine case might cause the problem so I decided to remove the board out of the PBO and to try without the case in the way. As soon as I did that everything when well; therefore the thickness of the PBO Alpine and the size of the hole where the connector is located is definitely an issue (At least for me).
If you look at the attached picture you can see the connector stopper indicated by the Blue arrows. Despite the extra length at the end of the plug on the board (see red arrow) the connector still can not go all the way thru because of the thickness of the PBO Alpine case. Once I drill a hole slightly bigger than the gap indicated by the two blue arrows I was able to connect my connector properly.
To conclude I believe that many people have or will end up with the same problem I had. The connector I used to connect to the PBO is a standard 1/8 A/V connector that came with my old portable DVD player. There are very common but as I already indicated there might be an issue with getting the connector all the way in.
Now all that being said doing what I just did will definitely void your warranty so I do not suggest you attempt the same unless you don't care about your warranty and have some skill with that kind of stuff.
Patriot could you look into this issue; I think you will find that many connector won't fit because of the thickness of the case ???? I don't know please investigate.