Asus R552LF - Manual (Page 45)

Notebook PC E-Manual 
. Push down the disc’s plastic
hub until it snaps onto the
optical disc drive hub.
. Push the drive tray gently to
close the optical disc drive.
NOTE: While data is being
read, it is normal to hear some
spinning and vibrating in the
optical disc drive.
Manual eject hole
The manual eject hole is located on the optical disc drive door and
is used to eject the optical disc drive tray in case the electronic eject
button does not work.
To manually eject the optical disc drive tray, insert a straightened paper
clip into the manual eject hole until the drive tray opens.
WARNING! Use the manual eject hole only when the electronic eject
button does not work.