Compaq Evo D300 Hardware Reference Manual page 14

Hardware Upgrades
2–2
3. Install any optional equipment. See the applicable sections of this
guide or to the documentation provided with the optional
equipment for instructions.
4. Replace the computer cover.
5. Turn on the monitor, computer, and any devices you want to test.
6. Reconfigure the computer, if necessary. Refer to the Computer
Setup Guide for instructions about using Computer Setup.
Hardware Reference Guide