I'm running a Sansui SR-838 and a TU-7900 through an AU-7900 and having some issues with speakers cutting out. I can sometimes fix it by jiggling the RCA connectors on the back of the amp or tapping on the turntable. It happens with all sources, but of course tapping on the turntable on works when using that. I've tried Deoxit on all the RCA connections on the back of the amp, and sometimes it works as a temporary fix. The amp was supposedly recapped before I bought it, but that could still be an issue. However, I'm thinking it's the connectors because I can temporarily fix it. Anyone have any recommendations? I'm capable of replacing the RCA cable on the turntable, but not comfortable rewiring the tonearm. Should I Deoxit the connections on the headshell and tonearm? How easy is it to replace the RCA connectors on the amp? Or is there a better way to clean them? Thanks in advance.