NAD 3130 Amplifier-same fault 15 years apart!!

[Old Sparky]

I ran the 3020 for over 3 hours this afternoon, playing CDs as I've doing with a Cambridge amp., with no sign of any failure, so, especially with other thing to do, I'm wondering whether to replace the RCA sockets as a precaution. After all the 3020 is probably around 30 years old by now