HP PC Commercial BIOS (UEFI) Setup
HP PC Commercial BIOS (UEFI) Setup
July 2020
919946-004
© Copyright 2016-2019 HP Development Company, L.P.
11 Computer Notifications 96
11 Computer Notifications
11.1 Introduction
Platforms that support HP PC Commercial BIOS have various mechanisms to indicate errors that occur during Power-On-
Self-Test (POST). The notifications can take several forms, such as:
• Blinks and Beeps
• On screen notifications that include the following:
○ Preboot messages (BIOS)
○ Pop-up messages within the OS
11.2 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 type (notebook or 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. Additional detail may be found in the system’s Maintenance and Service Guide.
The following table describes the meaning of critical blink codes.
Table 59 Computer notifications
Notebook
Desktop
Description
CAP / NUM
Battery
LED
Red
with
long
beeps
White
with
short
beeps
2
2
2
The main area 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 BIOS firmware.
Because it takes some time to load the firmware image and enable
video, 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 (memory failure).
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 detected or is unsupported.
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.