Is an input level spike on one channel normal when first powering on an 18i20?
I bought a used 3rd gen 18i20 from Guitar Center. I have not even started to learn how to use it yet but I want to make sure there's nothing wrong with it before my 45 days are up. Its in great condition, the plastic on the front isn't even peeled. I have it plugged into a furman. When I turn it on sometimes I will see an input spike all the way to red on channel 3. There is nothing plugged into the unit. It goes away after a second and then the green lock icon illuminates. Is this normal or is does this indicate some type of issue?