No idea what happened. My laptop was working fine last night. Turned it off properly and then kept it in its bag. Following day, nada. Won't even light up when I connect it to an outlet. Tried the hard reset, tried leaving it plugged without the battery, tried just the battery - still nothing.
Please, bare in mind that before any answer given on the forum, you should know that there are volunteers who give their time trying to solve user problems. They do have a life other than this forum including me.