alan

Thanks!

Yes, that helps a lot, it's the power switch I'm looking at. Is there a rule about turning it off when I turn off the computer?

This will probably sound like a tremendously silly question, but I just had a Smart series 650 watt 80+ bronze power supply installed in my desktop and it didn't turn on. I noticed there was a switch on the back, flipped it and the computer turns on. This is fine with me. But today I read something about switches on the back of power supplies that switch it from one voltage to another and if you have it on the wrong one you can wreck you power supply. I had thought the switch on my unit was simply a power switch. So, what is this switch?