Just wanted to confirm a few things..
Did you do a hard power down by holding the power button down for 5 seconds or by just briefly pressing the power button (which would put the computer to Sleep).
I've found this laptop occasionally does not properly recover from Sleeping under Win8, that's why I ask.
Either way, do a hard power down by holding the power button for 5 seconds.
Unplug the laptop and find the battery disconnect pinhole switch underneath (indicated with a picture of a battery lifted up) and using a paperclip press and hold for 30 seconds.
Try powering on again, do you atleast get the Acer logo appearing when powering on?
Let's start from there..