new to the forum and done some reading and browsing and ready to ask for some solid help here. my SX-636 has a constant hiss with snaps and pops (sometimes louder than others) at ALL time in the LEFT channel (regardless of speaker combo etc..)whether an audio signal is present or not. the person I bought this from had it serviced last year (paperwork) and an OT was replaced. I DO have the cluster of blue electrolytic caps on the left side. I am comfortable using a multi-meter and soldering. any help is appreciated. I can supply any other necessary info... thank you kindly!