Technics SA-EX320 Receiver "double cross" Questions

...when receiver keeps entering protection mode it means wires are crossed or touching somehwere. Double check all speaker wire connections at the receiver and speakers. More than likey the

...double checked them and they are in the right place but the receiver keeps turning off. I get a loud humming noise sometimes when the wires cross in the back, but I took all the plugs out and and ...

...the test and get a hiss on all but these 2. I have the tuner set to "surround" and I have double checked all the connection for + and - to be sure I have nothing crossed. This is the first ...

double-checked all the connections. It does it regardless of the source; TV, radio, CD, DVD. I've switch speaker wires, so I know it's not the speaker (wish it was). I'm wondering if this is common to