NOTE: Ensure that the computer and all attached devices are turned off. If your computer and attached devices did
not automatically turn off when you shut down your operating system, press and hold the power button for about 6
seconds to turn them off.
Identifier GUID-CEF5001C-74CA-41CA-8C75-25E2A80E8909
Status Released
Before working inside your computer
GUID-CEF5001C-74CA-41CA-8C75-25E2A80E8909
To avoid damaging your computer, perform the following steps before you begin working inside the computer.
1. Ensure that you follow the Safety Instruction.
2. Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.
3. Turn off your computer.
4. Disconnect all network cables from the computer.
CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from
the network device.
5. Disconnect your computer and all attached devices from their electrical outlets.
6. Press and hold the power button while the computer is unplugged to ground the system board.
NOTE: 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.
Identifier GUID-F99E5E0D-8C96-4B55-A6C9-5722A035E20C
Status Released
After working inside your computer
GUID-F99E5E0D-8C96-4B55-A6C9-5722A035E20C
After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning on your
computer.
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.
6
Working on your computer
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