Yesterday we had a large storm that knocked the power out for about 14 hour. When the electricity came back on, the computer started without being turned on. The problem is that it doesn't bootup and the screen remains dark. If I turn the main switch in the rear off and the on, it starts running without using the start button on the front, but again nothing happens. I should have unplugged it til power was restored, but I didn't. It isn't the monitor as I hooked a different one up and still get nothing. I kind of think the motherboard was damaged, but I am no expert on this.