HP Compaq Presario CQ71 Maintenance And Service Manual page 20

Component
(6) Drive light
*The 2 power lights display the same information. The light on the power button is visible only when the computer is open. The
power light on the front of the computer is visible whether the computer is open or closed.
12 Chapter 2 External component identification
Description
Blinking: The hard drive or optical drive is being accessed.