Blinking Light Codes - HP ZBook Power G10 Maintenance And Service Manual

Table 6-6 Power button functions and lights and their descriptions
Component
Power button
Front power light
Front AC adapter and battery light
Front hard drive light
Rear AC adapter light

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
Table 6-7 Blinking light codes and what they mean
Blink codes
Amber battery light: blinks 1 Hz continuously
Caps and num lk lights = 1 blink
Caps and num lk lights = 2 blinks
Caps and num lk lights = 3 blinks
Caps and num lk lights = 4 blinks
Description
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.
On: The computer is on.
Blinking: The computer is in the Sleep state.
Off: The computer is off.
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.
Blinking white: The hard drive is being accessed.
Amber: HP 3D DriveGuard has temporarily parked the hard drive.
White: The computer is connected to external power.
Off: The computer is not connected to external power.
Blinking lights and boot error codes on page
Error
Embedded controller unable to load firmware
Processor not executing code
BIOS recovery code unable to find valid BIOS recovery image
Memory module error
Graphics controller error
128.
Blinking light codes
77