Table 7-6 Power button functions and lights and their descriptions (continued)
Component Description
Amber: HP 3D DriveGuard has temporarily parked the hard drive.
Rear AC adapter light White: The computer is connected to external power.
O: 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 125.
Table 7-7 Blinking light codes and what they mean
Blink codes Error
Amber battery light: blinks 1 Hz continuously Embedded controller unable to load rmware
Caps and num lk lights = 1 blink Processor not executing code
Caps and num lk lights = 2 blinks BIOS recovery code unable to nd valid BIOS recovery image
Caps and num lk lights = 3 blinks Memory module error
Caps and num lk lights = 4 blinks Graphics controller error
Caps and num lk lights = 5 blinks System board error
Caps and num lk lights = 6 blinks Intel Trusted Execution Technology (TXT) Error
Caps and num lk lights = 7 blinks Sure Start unable to nd valid BIOS Boot Block image
Caps and num lk lights = 8 blinks Sure Start has identied a problem (Manual Recovery Policy Set)
POST error messages
The Power-On Self-Test (POST) is a series of diagnostic tests that runs automatically when the computer
is turned on. If the POST encounters a problem, visual error messages are displayed before the operating
system starts.
POST checks the following items to ensure that the computer system is functioning properly:
●
Memory
● Processors
● BIOS
● Mass storage devices
● Fans
The following table describes errors encountered during HP PC Hardware Diagnostics (UEFI).
Blinking light codes
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