hifi engine

TEAC AG-D9260 "Protect" Error

Hello, had problem with my Teac AV Receiver AG 9260. Unit was perfectly ok on ON state. But when adjusting its volume from remote and front panel volume control my Teac tuns into "Protect mode". And along with adjusting its volume there's a loud tic sound from the speaker as its increasing or lowering the volume control. Suspected caps where already replaced reflowing solder connections, done. Power output transistor drivers for 5 channels tested ok. Anyone encountered the same problem? Any idea what's the culprit with this problem? I missed the sound of my Teac AG D9260. Help!!!