Lenovo Ideapad 110-151SK doesn't turn on, even when it is off, the charging indicator isn't lighting when charger is plugged in (in "On" state, charger works). Sometimes, it stops like switch in between ongoing processes, sometimes stops in the booting process, sometimes it doesn't even turn on like now its happening now. For last 3/4 months these problems are prominent, now, anyone, please tell me, what to do?