I just purchased and received a brand new Egnater Rebel 30 1x12 combo. I plugged it in and thought everything was wonderful until about 20 minutes into playing when it started making a strange electrical noise. The best I can describe it is a repeating "tick, tick, splash!" sound or a "drip, drip, sizzle!" sound. I unplugged the guitar and the noise continues. I tried different outlets and it continues. The noise occurs regardless of the channel or any settings. It is very audible and unacceptable. I am dissapointed because I waited for this amp which was backordered since May and for 20 minutes I was really digging the tones. The odd repeating noise started up again after letting it rest overnight and simply turning it on without any guitar plugged in. Does anyone have any idea what this problem is and how or if it can be fixed? Thank you for all responses!