Lenovo IdeaPad U550 - Manual (Page 79)

Chapter 6. Upgrading and replacing devices
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Removing the optical drive - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
To remove the optical drive, do the following:
1
Remove the battery.
2
Slide and hold the optical drive latch in the unlocked position. Then
push the auxiliary latch of the optical drive forward to let the optical
drive pop up.
3
Gently pull the optical drive out.