Yamaha CRW2100E Owner's Manual page 23

Setup Procedures
7 Remove the four screws holding the CD-ROM drive in place, then
slide the drive forward and out of the drive bay.
Before removing the CD-ROM drive from the computer, make
sure that all the cables have been removed from the CD-ROM
drive's rear panel.
n Do not force pulling or apply excessive force to the CD-ROM drive.
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