How many times have I had this kind of phone call…. “my computers not working”… “the light on the monitor is on, but there aren’t any lights on the keyboard. everything seems connected, but there’s nothing on the screen.” Usually, my first question is along the lines of… “have you tried turning it off and back on.” I sometimes hear “I can’t use the start button” or something like that. At this point, I suggest that they try disconnecting the power and letting it sit for a few moments (5-10 seconds is usually enough.) Plugging it back in and trying the switch.