Post Error Messages - HP ZBook 17 G4 Mobile Workstation Maintenance And Service Manual

Component
tested
BIOS
Hardware
System board

POST error messages

The Power-On Self-Test (POST) is a series of diagnostic tests that runs automatically when the computer is
powered 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 key Post Error messages. For more detailed information, see
Messages and User Actions on page
Major/
minor
code Error condition
2.2 The main area (DXE) of BIOS has
become corrupted and there is no
recovery binary image available
2.3 The embedded controller policy
requires the user to enter a key
sequence (SureStart 2.0)
2.4 The embedded controller is
recovering the boot block or DXE.
3.2 The embedded controller has timed
out waiting for BIOS to return from
memory initialization
3.3 The embedded controller has timed
out waiting for BIOS to return from
graphics initialization
3.4 The system board displays a power
failure (crowbar)
5.2 The embedded controller cannot find
valid firmware
5.3 The embedded controller has timed
out waiting for the BIOS
144.
Caps
Lock/Num
Lock LED Action
CAP/NUM Blink Contact service for system board replacement.
= 2
CAP/NUM Blink Perform SureStart manual recovery if boot
= 8 block: Up Arrow + Down Arrow + ESC.
Battery LED Wait for DXE recovery to complete.
White and
Amber
blinking
CAP/NUM Blink Reseat the memory modules. If the issue
= 3 persists, try replacing the memory modules.
Possible RAM or system board failure.
CAP/NUM Blink If the system has an MXM module, try a
= 4 different MXM module. Otherwise, the board
most likely needs to be replaced.
CAP/NUM Blink Check power cable connections, or verify that
= 5 any external power adapter has sufficient
capacity for system.
CAP/NUM Blink Contact service for system board replacement.
= 7 (2 BB
failure)
Battery LED
Blinking = 1 Hz
(3 B failure)
CAP/NUM Blink Contact service for system board replacement.
= 1
General troubleshooting steps
POST Error
87