Dell Vostro 420 Service Manual page 78

For the Vostro 220s, lift the release latch that secures both the optical
b
drive and the 3.5-inch device in their respective drive cages.
Remove the empty-bay cover from the bezel: From the inside of the
c
bezel, press the release latch on the cover, and lift the cover from the
bezel.
1 inside of bezel
3 cover for empty bay
5 Remove the media card reader from its packaging.
6 For the Vostro 220s, install two screws on each side of the media card
reader.
7 Gently slide the device into the bay from the front of the computer.
8 For the Vostro 420 and Vostro 220:
Align the screw holes in the device with the screw hole and slot in the
a
drive cage.
Replace and tighten the two screws to secure the device in the drive
b
cage.
78
Drives
3
2
1
2 release latch