HP PC Commercial BIOS (UEFI) Setup Whitepaper

August 2018
919946-003
HP PC Commercial BIOS (UEFI) Setup
© Copyright 2016-2018 HP Development Company, L.P.
8 Computer Notifications 48
8.2 Blink and Beep Codes
Some system errors prevent the use of the video screen; instead, the system provides error information through blink
codes using LED lights. The LED light used depends on the system being a notebook or a desktop. The codes are presented
in a sequence. For desktop, this means red blinks followed by white blinks. Audible long and short beeps accompany red or
white blinks, respectively. The table below describes the meaning of critical blink codes.
Table 29 Computer notifications
Notebook
Desktop
Description
CAP NUM
Battery
LED
Red
with
long
beeps
White
with
short
beeps
2
2
2
The main area (DXE) of BIOS has become corrupted and there is no
recovery binary image available
8
2
3
The HP Endpoint Security Controller policy requires the user to enter
a key sequence (Sure Start 2.0)
White and
Amber
blinking
2
4
The HP Endpoint Security Controller is recovering the boot block or
DXE. Since it takes 10 sec. or so to load the DXE image and get video
in the DXE case, this blink code is necessary. (Sure Start)
3
3
2
The HP Endpoint Security Controller has timed out waiting for BIOS
to return from memory initialization
4
3
3
The HP Endpoint Security Controller has timed out waiting for BIOS
to return from graphics initialization
5
3
4
The system board displays a power failure (crowbar)
3
5
The CPU is not being detected
3
6
The CPU does not support an enabled feature (typically this applies
only to TXT)
7
1
5
2
The HP Endpoint Security Controller cannot find valid firmware