I recently bought this amp and up until now (I've owned it for less than a month) it has sounded great. Now, when I start up the amp, there is no sound produced. I don't recall doing anything different in the time I had it except for normal use. First of all, I have done a factory reset, twice, to be sure. To describe the problem in detail: I flip the power switch on and the amp makes the popping sound it usually makes when you change to a different setting or just turn the amp on. But immediately after the popping sound, the sound just fades out to the point where you can't hear anything at all. In addition, starting the amp while plucking strings on my guitar produces the normal sound I'd expect to hear, but it fades away within 1-2 seconds. I normally have the channel volume to the max and I usually set my master volume to 10 o'clock. I'm thinking of taking it to a service center, but I thought I'd post this on here first to see if anyone else has encountered this problem. Thank you in advance.