Only about 2 years old, solid state. Series of loud bangs , about 2 a second, for a variable number of seconds but about 10 or 20 seconds calms down to normal. Only at switch on fropm cold, off and on , minutes or even an hour later , there is no bangs. Other than failing power supply smoothing cap is this a known fault symptom ? as annoyingly difficult to induce such a fault. Other than changing the ps caps any hints for zeroing in on such an intermittant fault, if further into the amp ?
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on