HP ZBook 15 G3 Base Model Mobile Workstation User Manual download pdf (Page 154)

Blinking lights and boot error codes

The information below is from the white paper HP Business Notebook and Desktop PC F10 Setup, 2014

Business PC models.

In some cases, when the host processor is not executing code or does not have the necessary code to drive

the display, light blink codes inform you of a problem.

Table 7-6 Boot-error codes

Blink codes Error

Amber battery light: blinks 1 Hz continuously Embedded Controller unable to load rmware

Caps/num lock lights = 1 blink Processor not executing code

Caps/num lock lights = 2 blinks BIOS recovery code unable to nd valid BIOS recovery image

Caps/num lock lights = 3 blinks Memory module error

Caps/num lock lights = 4 blinks Graphics controller error

Caps/num lock lights = 5 blinks System board error

Caps/num lock lights = 6 blinks Intel Trusted Execution Technology (TXT) Error

Caps/num lock lights = 7 blinks Sure Start unable to nd valid BIOS Boot Block image

Caps/num lock lights = 8 blinks Sure Start has identied a problem (Manual Recovery Policy Set)

Processor not executing code

This computer has experienced a problem due to the failure of certain code to execute, resulting in a failed

startup of the processor. The issue could be related to the processor or the system board in the computer. If

the processor is socketed, be sure that the processor is seated correctly in the socket. If this error reoccurs,

refer to General troubleshooting steps on page 81.

NOTE: The computer will attempt to notify you of this problem through a series of blinking lights. When you

attempt to turn on the computer from an “O” or “Hibernated” state, lights associated with the caps lock and

num lock keys will both blink once followed by a pause, and then continue in a repeating pattern.

BIOS recovery code unable to nd valid BIOS recovery image

This computer has experienced a problem in locating a valid BIOS image, resulting in a failed startup. This

problem may be resolved by placing a clean copy of the system BIOS on a USB key or in the appropriate

storage device directory and performing a reboot. If this error reoccurs, refer to General troubleshooting

steps on page 81.

NOTE: The computer will attempt to notify you of this problem through a series of blinking lights. When you

attempt to turn on the computer from an “O” or “Hibernated” state, lights associated with the caps lock and

num lock keys will both blink twice followed by a pause, and then continue in a repeating pattern.

Memory module error

This computer has experienced a memory initialization problem resulting in a failed startup. This issue may

be related to the memory modules in the computer. This problem may be resolved by ensuring that memory

modules are correctly inserted and seated. If this error reoccurs, a service event is required to determine the

source of the error (memory modules or system board) and take the appropriate corrective action.

142 Chapter 7 Troubleshooting guide

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HP ZBook 15 G3 Base Model Mobile Workstation User Manual Page 154