Just bought a Fender Ultimate Chorus 2X10 Amplifier.  2 Inputs, Reverb effect built in, etc.  Solid state digital amp.  Got it home and there was a lot of buzz on the clean and drive channels.  About half volume it starts popping loudly.  There is a repetetive cracking noise any time I play, but not just sitting.  The buzz is there even when nothing plugged into inputs.  I took the cover off, removed all the connections and cleaned them and reconnected them, put a nut on the input jack that didn't have one.  Found 2 capacitors that had been glued together.  The glue was coming loose so I ran a strip of electrical tape between them to hold them from shaking and breaking solders.  Put it back together and it sounded great.  After playing at 3/4 volume with the gain way up on the drive channel for about 10 minutes, no touching the amp, the crackle came back and it started popping again.  Please help, I can't figure out where to start!