my Lenovo u530 touch laptop just shut down randomly. I closed the screen for a while to go do something else, then I came back, and opened the laptop. the screen was all black because I thought it was just in sleep mode. I pressed the power button and it started to boot up, like normal. first the little power sign was white, then the backlight keys came on. almost suddenly it shut down again. and then it automatically repeated the same cycle of turning off and on. on the side of the computer the battery sign was solid white, but every time that it turned on and off, the little power button on the side f the computer did too. I tried charging it with the adaptor but that didn't doo anything, except make a weird musical-ish sound, no matter how many times I turn it off manually, and then turn it back on, it still repeats this process.