Dell OptiPlex 755 - Manual (Page 141)

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Replacing the Computer Cover
User's Guide
Mini-Tower, Desktop, and Small Form Factor Computers
Ultra Small Form Factor Computers
Mini-Tower, Desktop, and Small Form Factor Computers
1. Ensure that all cables are connected, and fold cables out of the way.
Gently pull the power cables toward you so that they do not get caught underneath the drives.
2. Ensure that no tools or extra parts are left inside the computer.
3. To replace the cover:
a. Align the bottom of the cover with the hinge tabs located along the bottom edge of the computer.
b. Using the hinge tabs as leverage, rotate the cover downward to close it.
c. Snap the cover into place by pulling back on the cover release latch and then releasing the latch when the cover is properly seated.
d. Ensure that the cover is seated correctly before moving the computer.
4. Attach the computer stand (if applicable). For instructions, see the documentation that came with the stand.
5. Connect your computer and devices to electrical outlets, and turn them on.
After you remove and replace the cover, the chassis intrusion detector (optional on some computers), if installed and enabled, causes the following
message to appear on the screen at the next computer start-up:
ALERT! Cover was previously removed.
6. Reset the chassis intrusion detector in System Setup by changing Chassis Intrusion to On or On- Silent.
Ultra Small Form Factor Computers
1. Follow the procedures in Before You Begin .
2. If applicable, remove the cable cover (see Cable Cover (Optional) ).
3. Replace the computer cover:
a. Tilting the cover slightly, align it with the retaining strip at the back of the system.
b. Slide the computer cover backward until it snaps into place.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.
NOTE: If an administrator password has been assigned by someone else, contact your network administrator for information on resetting the chassis
intrusion detector.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your
computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.
NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface. While you work, periodically touch an
unpainted metal surface to dissipate any static electricity that could harm internal components.
CAUTION: Graphics card heat sinks can become very hot during normal operation. Ensure that a graphics card heat sink has had sufficient time to
cool before you touch it.