I've got a panasonic reciever that has been working fine for a few months now. But recently I'm having a problem where my centre channel totally cuts out after maybe 5-10 minutes of use. First I thougth the speaker could be blown, so I bought a new Yamaha centre channell... that didn't solve my problem. Maybe there's a short in the wiring? or is my reciever fucked up? Thanks in advance.