Turned it on and the speaker blipped a few times rather than just once, went to play a game and no sound. Test output from PC and it's working. Speaker wires are good, amp gets power and LED lights up but I get no sound. When I turn the amp up I used to get static through my speakers, nothing now. Think I can fix it? If not what is a good amp that won't die on my in a little more than a year? Need to power Polk RTi-A1 2.0 system.