Advice from any Sammy SP46L6HX owners please. When switching off the for the night i put the set into standby mode, I can hear the fan still running for a few minutes then it stops, normal I think. Should i then wait for the fan to stop running, and then turn the main power switch to off, or is OK to leave in in standby until it's switched on again next day. When going away for a few days I always turn the main power switch to off. Cambo.