Asus Q501LA - Manual (Page 95)

Notebook PC E-Manual 
4. My Notebook PC does not boot up. How can I fix this?
You can try doing any of the following suggestions:
• Remove all connected devices to your Notebook PC then
restart your system.
• Press F9 upon startup. When your Notebook PC enters
Troubleshooting, select Refresh or Reset your PC.
• If the problem still exists, contact your local ASUS service
center for assistance.
5. Why can’t my Notebook PC wake up from sleep or hibernate
mode?
• You need to press the power button to resume your last
working state.
• Your system might have completely used up its battery
power. Connect the power adapter to your Notebook PC
and connect to a power outlet then press the power button.