Hello, At the high school I attend, I mix on an old Mackie SR32.4. I have no idea how old it is, although I have a feeling it is at least ten years old. I have been having problems with the consistency of the inputs, more specifically with the premps and a little bit with the EQ's. Is it possible that the board has gone bad after all these years? The board was not very well taken care of before I got there.