Dell Precision T7400 User's Guide - Page 224

Move it slightly up and to the right at an angle to free it from the card, Remove its four screws.

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CAUTION: Your computer is heavy (it has an approximate minimum weight of 55 lbs) and can be difficult to maneuver. Seek assistance before attempting to lift, move, or tilt it; this computer requires a two-man lift. Always lift correctly to avoid injury; avoid bending over while lifting. See your Product Information Guide for other important safety information. CAUTION: The computer stand should be installed at all times to ensure maximum system stability. Failure to install the stand could result in the computer tipping over, potentially resulting in bodily injury or damage to the computer. 2 Remove the computer cover (see "Replacing the Computer Cover" on page 145). 3 If a graphics riser card is installed, remove it: a Remove its four screws. b Disconnect its power cable. c Move it slightly up and to the right at an angle to free it from the card fan and the memory-riser support structure. d Set the riser aside. 224 Adding and Replacing Parts

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224
Adding and Replacing Parts
CAUTION:
Your computer is heavy (it has an approximate minimum weight of 55
lbs) and can be difficult to maneuver. Seek assistance before attempting to lift,
move, or tilt it; this computer requires a two-man lift. Always lift correctly to avoid
injury; avoid bending over while lifting. See your
Product Information Guide
for
other important safety information.
CAUTION:
The computer stand should be installed at all times to ensure
maximum system stability. Failure to install the stand could result in the computer
tipping over, potentially resulting in bodily injury or damage to the computer.
2
Remove the computer cover (see "Replacing the Computer Cover" on
page 145).
3
If a graphics riser card is installed, remove it:
a
Remove its four screws.
b
Disconnect its power cable.
c
Move it slightly up and to the right at an angle to free it from the card
fan and the memory-riser support structure.
d
Set the riser aside.