Compaq Evo N400c Hardware Manual page 11

5. Turn on the computer by sliding and momentarily holding,
then releasing, the power switch 1.
When power is turned on:
The power/suspend light 2 turns on.
The battery pack in the primary battery bay and the external
battery pack (if attached) begin to charge and the battery
light 3 turns on. The battery light:
You are prompted to begin software setup.
Hardware Guide
Remains on while the battery packs are charging.
Turns off when the battery packs are fully charged.
Hardware and Software Setup
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