Dell OptiPlex GX240 - Manual (Page 103)

Installing Upgrades 105
NOTICE: When you connect an interface cable, do not reverse the interface
cable (do not place the colored stripe away from pin 1 of the connector).
Reversing the cable prevents the drive from operating and could damage the
controller, the drive, or both.
Hard Drives
CAUTION: To avoid the possibility of electric shock, turn off the
computer and any devices, disconnect them from electrical
outlets, and then wait 10 to 20 seconds before you open the
computer cover. Also, before you install a drive, see the other
precautions in “ Safety First—For You and Your Computer .”
1 If you are replacing a hard drive that contains data you want to keep,
be sure to make a backup of your files before you begin this procedure.
NOTICE: Ground yourself by touching an unpainted metal surface on the
back of the computer.
NOTICE: To avoid damage to the drive, do not set it on a hard surface.
Instead, set the drive on a surface, such as a foam pad, that will sufficiently
cushion it.
2 Open the computer cover .
3 On the small desktop computer, remove the plastic shroud covering
the hard drive by pressing in on the indented tab at the top of the
shroud and lifting the shroud away.