<font color='#000000'>Hi James in Missouri,
I didn't respond to your question sooner because I don't really have a good answer for you. But since no one else has responded, I'll pass on what little I can. We have three Sony changers here, one DVD changer, an ES Series CD changer, and one of the standard Sony CD changers. I've never had any problems at all with the input or output connectors on any of them. I generally use connectors from Vampire, which are precision machined, so they make excellent contact, without being difficult to connect and disconnect due to an over-tight fit. However, I've used other cables with the changers, both very tight fiting "premium" connectors and the really cheap stuff, and in no case have I ever had a problem with the connections staying tight. If anything, the connectors that use high pressure are very hard to disconnect, but well made connectors slide in and out very easily, and stay connected very well.
Unfortunately, none of this gives us the first clue as to what might be causing your problems. The only thing that comes to mind is that the connectors on the changer must be damaged. Have you given them a close look? All I can say is that you have a strange problem that you shouldn't have. Perhaps knowing that someone else doesn't have the problem will help. Good luck sorting it out.
Chuck</font>