'''Not turning on properly'''
Make sure that you are holding the power button for long enough to give the computer a chance to turn on.
'''Display'''
If the screen remains black when you turn the power on, but lights at the bottom of the computer light up then the display has gone bad.
'''Drained/bad battery'''
The battery maybe completely dead, and will need a replacement.
[[Samsung Series 5 Ultrabook Troubleshooting]]