Asus X556U E-Manual page 23

Optical disc drive eject button
Press this button to eject the optical drive tray.
Optical disc drive manual eject hole
The manual eject hole is used to eject the drive tray in case the
electronic eject button does not work.
WARNING! Use the manual eject hole only when the electronic
eject button does not work. For more details, refer to the Using
the optical drive section in this manual.
Notebook PC E-Manual
23