Hello..........I too would power down when not using electronics. Would my 20 year old Yamaha TX81Z still be working perfectly if I left it powered up all this time?? I use my computer everyday and turn it off nightly. It's 4 years old and running strong. I have heard many say that daily turning off and on electronics stresses the solder joints on the cards............... I haven't experienced this............ I've seen this topic heavily debated before!