Hey guys, I have an Onkyo TX-SV70 Pro hooked up to a newer Polk audio surround sound. It worked great for about 30 minutes, and then now randomly the amp makes a "clicking" noise (without shutting off), and there is no sound. Then it will "click" and the speakers go back on. I thought it was a power supply, but now the amp is running from a single plug off the wall. Any thoughts?