I HAVE SAME PROBLEM AS YOU HAVE WITH Asus T 300 CHI , MINE IS JUST 3 MONTHS. I tried pressing on button and everything like what you did but same thing it has no life. I DID NOTHING but sleep for an hour when I wake I press on button to start my computer but I cannot make it anymore. A the docking / keyboard has life it is blinking so with the blue tooth light but tablet is dead. I also tried the functions in keyboard but DOES NOT work. I HOPE Asus could help.
Melanie