Compaq Evo D310 MT Hardware Reference Manual page 33

Hardware Upgrades
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2–22
3. Reconnect the power cable 1 to the computer and plug the cable
into an electrical outlet 2.
Reconnecting the Power Cable
4. Reconnect all peripheral devices to the computer.
WARNING: To reduce the risk of electrical shock, fire, or damage to the
equipment, do not plug telecommunications or telephone connectors
into the network interface controller (NIC) ports.
5. Turn on the computer by pressing the power button.
Hardware Reference Guide