fender princeton reverb

problems with fender amp?
i got a fender princeton chorus.when i switch it off it makes strange sounds..two thuds and a fizz(expecially when i turn it off with the reverb on).is it normal?what does it mean?
Your amplifier is working, but there is a trickle of bleeding on your bipolar transistor. That is a sign that your amp may eventually quit working.
Replace the bipolor transistor.
Jim Campilongo Fender Princeton Reverb Amplifier