Sony PCG-F420 Primary User Manual page 36

Your computer comes with a either a CD-ROM or DVD-ROM drive. The
DVD-ROM drive plays both DVD-ROMs and CD-ROMs.
Turn on the computer.
✍
Press the Eject button to open the the CD-ROM or DVD-ROM drive.
The tray slides out.
Place a DVD-ROM/CD-ROM in the tray with the label side facing
up. For DVD-ROMs which can be played on both sides, the side of
the disc facing up is the side that plays. Push the disc onto the hub
until the disc clicks into place.