Won't turn on ... Means??? Absolutely nothing happens, no surface logo, no display flash of any kind? If that's the case, try holding the power button for thirty seconds then release it. Wait a few seconds then press and release the power button.
if that doesn't work ... Try holding the volume up button while holding the power button for at least 20 seconds ... You should see something on the screen ... Release both and then press thenpower button tomturn on if it's not already on...
If this also doesn't work it might be really dead.... Charge it over night to be sure and try the above again.
If it's still not coming on... The drive is removable if you want it bad enough, you'll have to remove the screen to get at it...