Hello, So I recently acquired an Acoustic B800H head with an Acoustic B410 mkII and the head has not worked since I got it. When it is plugged in, it powers on with the blue light on the switch turning on, however, it does not make ANY sound at all, to any output. As I have had little experience using heads and cabs, I am unsure if I am simply overlooking anything. While the power light comes on, none of the fans appear to spin and even when I put the gain up all the way, the clip light does not light up. This particular head has a mute button and I can confirm that there is no sound with or without it on, the same goes for all the other buttons. Is there something else I should be doing, or is the head simply shot? I know it is not the cab because I tested it with a different head and it worked. Thanks.