HP PC Commercial BIOS (UEFI) Setup Administration Guide For Business Notebook and Desktop 2015 Models - Technical whitepaper

May 2016
857394-002
HP PC Commercial BIOS (UEFI) Setup
© Copyright 2016 HP Development Company, L.P.
7 Computer Notifications 47
7.2 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 27 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 embedded controller policy requires the user to enter a key
sequence (SureStart 2.0)
White and
Amber
blinking
2
4
The embedded 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. (SureStart)
3
3
2
The embedded controller has timed out waiting for BIOS to return
from memory initialization
4
3
3
The embedded 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 embedded controller cannot find valid firmware