I have a 5 year old ASUS model U46E. Last time I used it was sunday and it worked just fine. Today during class I try and turn it on and nothing happens. I plug it in and the charging light doesn't even go on. I try another outlet and the same thing. I get home to try another outlet and it still does nothing. Holding the power button for 20 seconds did nothing as well. Any help will be appreciated as I've been using it as a daily laptop and it's been a great one.