One amp was purchased new, one pre-owned. Both used briefly in late '08 / early '09 before being stored (indoors, climate controlled, zero humidity) until recently.
Both amps now generate a rapid then decreasing to steady clicking or popping noise. Inputs, mono, stereo makes no difference. Problem remains with only power and speaker/s connected.
What would cause this problem to appear after an extended period of non use? Is this a known issue? Fixable? Cost effective?
The associated DLIII and P-200 pre amp function perfectly having been used and stored identically.