Just to get this out of the way, my tv is a SONY Trinitron from around 2000 or so.
I just noticed this while playing some SNES and NES games. It's not extremely noticable but the entire picture flickers a bit every 10 seconds or so. Any idea what might be the cause of this? I put it in service mode by entering a button combination I found on Google and no settings there seemed to do anything.
Suggestions?