Dell OptiPlex 7440 All-In-One Owners Manual - Page 7

Turning off your computer, After working inside your computer

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About this task NOTE: Disconnect all power sources before opening the computer cover or panels. After you finish working inside the computer, replace all covers, panels, and screws before connecting to the power source. NOTE: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage at www.Dell.com/regulatory_compliance CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product. CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface at the same time as touching a connector on the back of the computer. CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by its pins. CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented and aligned. NOTE: The color of your computer and certain components may appear differently than shown in this document. CAUTION: System will shut down if side covers are removed while the system is running. The system will not power on if the side cover is removed. CAUTION: System will shut down if side covers are removed while the system is running. The system will not power on if the side cover is removed. CAUTION: System will shut down if side covers are removed while the system is running. The system will not power on if the side cover is removed. Turning off your computer After working inside your computer About this task After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning on your computer. Steps 1. Connect any telephone or network cables to your computer. CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the computer. 2. Connect your computer and all attached devices to their electrical outlets. 3. Turn on your computer. 4. If required, verify that the computer works correctly by running ePSA diagnostics. Working on your computer 7

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About this task
NOTE:
Disconnect all power sources before opening the computer cover or panels. After you finish working inside the
computer, replace all covers, panels, and screws before connecting to the power source.
NOTE:
Before working inside your computer, read the safety information that shipped with your computer. For additional
safety best practices information, see the Regulatory Compliance Homepage at
www.Dell.com/regulatory_compliance
CAUTION:
Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by
your warranty. Read and follow the safety instructions that came with the product.
CAUTION:
To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically
touching an unpainted metal surface at the same time as touching a connector on the back of the computer.
CAUTION:
Handle components and cards with care. Do not touch the components or contacts on a card. Hold a
card by its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by
its pins.
CAUTION:
When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some
cables have connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking
tabs before you disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending
any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented and
aligned.
NOTE:
The color of your computer and certain components may appear differently than shown in this document.
CAUTION:
System will shut down if side covers are removed while the system is running. The system will not
power on if the side cover is removed.
CAUTION:
System will shut down if side covers are removed while the system is running. The system will not
power on if the side cover is removed.
CAUTION:
System will shut down if side covers are removed while the system is running. The system will not
power on if the side cover is removed.
Turning off your computer
After working inside your computer
About this task
After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning
on your computer.
Steps
1.
Connect any telephone or network cables to your computer.
CAUTION:
To connect a network cable, first plug the cable into the network device and then plug it into the
computer.
2.
Connect your computer and all attached devices to their electrical outlets.
3.
Turn on your computer.
4.
If required, verify that the computer works correctly by running
ePSA diagnostics
.
Working on your computer
7