Compaq 159715-002 Guide to Features&Upgrades Compaq Deskpro EN Series of P - Page 30

Device Installation Sequence It is very important that you follow this sequence of steps to ensure the proper installation of any optional equipment: 1. If you have locked the Smart Cover Lock, use Computer Setup to unlock it. For more information about Computer Setup, refer to the Software Reference Guide. 2. Remove any diskette or compact disc from the computer. 3. Turn off the computer and any devices connected to it. 4. Disconnect the power cord from the power outlet and then from the computer. 5. Disconnect the keyboard, monitor, and other external devices connected to the computer.  During disassembly, label each external device cable as you remove it, noting its position and routing. Keep all screws with the units removed. ! WARNING: To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the power outlet, and allow the internal system components to cool before touching. ! WARNING: To reduce the risk of electrical shock, fire, or damage to the equipment, do not plug telecommunications/telephone connectors into the network interface controller (NIC) receptacles. CAUTION: Before servicing the computer, be sure that no green lights are illuminated on the system board. CAUTION: When the unit is plugged in, the power supply always has 5 V applied to the system board even when the unit is turned off. Failure to disconnect the power cord can result in damage to the system. CAUTION: Static electricity can damage the electronic components of the computer or optional equipment. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. Refer to the Safety, Care & Regulatory Information guide for more information. 6. Open the computer by removing its cover. Refer to "Removing the Computer Cover" in this chapter for instructions. Guide to Features & Upgrades 3-5