Yes psyprof1, the ports are orientated vertically on the back of the 37" Panasonic. Odd isn't it? Gonk, I may try to rig a support using some velcro to get the weight off the port. However, I still think the port is expanding with temperature. The cable works itself loose after the TV has been on for an hour or so. My Dad really likes his system (includes an LFM-2!!) except he gets pretty frustrated to have to get up in the middle of a movie to push the HDMI cable back in. I hope a cable support will solve both potential reasons the connection is lost. I appreciate everyone making suggestions to fix the problem.

I'm looking for a new plasma and some have the HDMI ports aimed down! You'd have to support the cable in that case because the HDMI connection is so loose. Something to think about when making such a big purchase...