It mat not be in protect as its not what the protect is set for...Pauls is right it could be a speaker temporarily stopping the amp by getting it a little warm...Sony arent known for there comprehensive quality of there gear so how do you know if the system is in protect as the thermal cuttout on the amp will cut in before the protect trip works........
Check the speakers, maybe the wiring to.....the earth and the power supply......any could cause it to go into protect...but that will show up on the protect light by rights.
Go Sony !!!???
