Gateway 7400 System Manual page 56

8
Pull the drive out of the chassis, then remove the rails on both sides of
the drive.
9
Snap the rails onto the new drive in the same positions. The rails are
labeled. Make sure the front rail extensions are to the front of the drive.
Important
10
Align the rails with the open bay, then slide the drive into the bay until
the locking tabs snap into place.
11
Connect the power and data cables, making sure the cables are in their
original positions. (See your drive documentation for proper cable
orientation.)
12
Replace the bezel. (See "Replacing the bezel" on page 28.)
13
Close the case. (See "Closing the case" on page 27.)
14
Reconnect the power cord, the modem cord, and all other external
peripheral devices, then turn on the system.
48
Replacing and Adding System Components
The rails on the CD drive are different from those on the
3.5-inch drives. Make sure you install the correct rails on
the CD drive.