I have a new Dell XPS8910 and a Dell S2316M monitor purchased last year. The computer uses a new type cord to connect to the monitor. I bought an adapter to join the monitor to my computer. The problem is if I touch the tower the monitor no longer connects. 

The XPS8910 came with an adapter to connect to monitor. My new PC was replaced by Dell due to problems. The replacement PC needed a different pin layout so I bought a new adapter.  Both the 1st and current PC have problems keeping the monitor connected. With some adjusting it reconnects. This is very annoying. I have tried tightening the connections, but any moving of the tower causes a disconnect.

Any ideas of what I can do to fix the annoying problem?