screen is black, the light is white and can not load

I recently replaced the battery on my Asus Table T100TA with your advice and it worked great, but now a month later for some reason the screen is black, the light is still white and I can not load the software. I followed the all the advice from the troubleshooting manual using function keys. Can the power button be broken??? I did not use it. I just sat on my desk. Please advise. What am I missing?