Table 6-6 Power button functions and lights and their descriptions
Component Description
Power button When the computer is off, press the button to turn on the computer.
When the computer is on, press the button briefly to initiate Sleep (Windows) or
Suspend (Linux®).
When the computer is in the Sleep state, press the button briefly to exit Sleep (Windows)
or Suspend (Linux).
When the computer is in Hibernation, press the button briefly to exit Hibernation.
IMPORTANT: Pressing and holding down the power button results in the loss of
unsaved information.
If the computer stops responding and operating system shutdown procedures are
ineffective, press and hold the power button.
Front power light On: The computer is on.
Blinking: The computer is in the Sleep state.
Off: The computer is off.
Front AC adapter and battery light White: The computer is connected to external power, and the battery is charged from
90% to 99%.
Amber: The computer is connected to external power, and the battery is charged from 0
to 90%.
Blinking amber: A battery that is the only available power source has reached a low
battery level. When the battery reaches a critical battery level, the battery light blinks
rapidly. By default, the critical battery level is defined in Power Options as 5%.
Off: The battery is fully charged.
Front hard drive light Blinking white: The hard drive is being accessed.
Amber: HP 3D DriveGuard has temporarily parked the hard drive.
Rear AC adapter light White: The computer is connected to external power.
Off: The computer is not connected to external power.
Blinking light codes
During startup, the computer may not boot properly. If this occurs, blinking light codes can help identify
the cause.
The computer uses the following blinking lights to identify a hardware component that reports an error
during startup. For more information, see Blinking lights and boot error codes on page 128.
Table 6-7
Blinking light codes and what they mean
Blink codes Error
Amber battery light: blinks 1 Hz continuously Embedded controller unable to load firmware
Caps and num lk lights = 1 blink Processor not executing code
Caps and num lk lights = 2 blinks BIOS recovery code unable to find valid BIOS recovery image
Caps and num lk lights = 3 blinks Memory module error
Caps and num lk lights = 4 blinks Graphics controller error
Blinking light codes
77
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