I was using my Toshiba laptop, and all of a sudden, the screen went black, the power light went out, and it died. I have tried turning it back on, and the blue power light comes on for a second or two, and then goes back out and the laptop won't turn on. I have unplugged it from AC power supply; no changes. When I plug it back in, the blue light that comes on when the battery is charging did not come on. I took the battery out and put it back in; no avail. The laptop was not hot to the touch, and it had been turned off for several hours prior.