Television and Home Theater

I moved my TV to a flat recently and tried to set it up, all goes well until I try to connect the rear side speakers, when I connect either speaker all the sound dies. On disconnecting there is a short pause then the sound returns. I have tried all sorts of configurations of sound setups, and alternative similar speakers with the same results. 

  Is this a problem inside the TV, or am I missing something obvious?  Any advice much appreciated.

<><>Hi I read all of the entries that seemded similar to mine and your
responses. My 1.5 year old Panasonic WRx 54" rear projection
would make occasional loud snapping sounds. Last week it shut
down. I disconnected it from power for > 4 hours, removed the
back and gently vacuumed a significant amount of dust. I tried to
start it made a sizzling/snapping sound with some flashes of light
before shutting down. I watched this light show and have isolated the

I have a 60 inch Mitsubishi rear projection TV that has horizontal lines while warming up.  It takes about 15 minutes for the lines to go away and then the picture is great.  Model VS-60705 built in 2000. 

I live in a rural area where there are no television repairmen.  Does anyone know how to fix this problem &/or know where to get a schematic of the boards?

 thanks,

 Jim57