HP EliteDesk 800 G6 Maintenance and Service Guide - Page 103

second pause occurs after the last major blink.

Page 103 highlights

● AC adapter ● System board power ● Processor failure ● BIOS corruption ● Memory failure ● Graphics failure ● System board failure ● BIOS authentication failure If an error is detected, specific patterns of long and short blinks, accompanied by long and short beeps (where applicable) are used to identify the error. These patterns will make up a two part code: ● Major - the category of the error ● Minor - the specific error within the category NOTE: Single beep/blink codes are not used. Table 7-2 Beep pattern error identification Number of long beeps/blinks Error category 1 Not used 2 BIOS 3 Hardware 4 Thermal 5 System board Patterns of blink/beep codes are determined by using the following parameters: ● 1 second pause occurs after the last major blink. ● 2 second pause occurs after the last minor blink. ● Beep error code sequences occur for the first 5 iterations of the pattern and then stop. ● Blink error code sequences continue until the computer is unplugged or the power button is pressed. NOTE: Not all diagnostic lights and audible codes are available on all models. The red LED blinks to represent the major error category (long blinks). The white LED blinks to represent the minor error category (short blinks). For example, '3.5' indicates 3 long red blinks and 5 short white blinks to communicate the processor is not detected. Table 7-3 Interpreting POST diagnostic front panel lights and audible codes Category Major/minor code Description BIOS 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. Interpreting system validation diagnostic front panel LEDs and audible codes 93

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AC adapter
System board power
Processor failure
BIOS corruption
Memory failure
Graphics failure
System board failure
BIOS authentication failure
If an error is detected,
specific
patterns of long and short blinks, accompanied by long and short beeps (where
applicable) are used to identify the error. These patterns will make up a two part code:
Major – the category of the error
Minor – the
specific
error within the category
NOTE:
Single beep/blink codes are not used.
Table 7-2
Beep pattern error
identification
Number of long beeps/blinks
Error category
1
Not used
2
BIOS
3
Hardware
4
Thermal
5
System board
Patterns of blink/beep codes are determined by using the following parameters:
1 second pause occurs after the last major blink.
2 second pause occurs after the last minor blink.
Beep error code sequences occur for the
first
5 iterations of the pattern and then stop.
Blink error code sequences continue until the computer is unplugged or the power button is pressed.
NOTE:
Not all diagnostic lights and audible codes are available on all models.
The red LED blinks to represent the major error category (long blinks). The white LED blinks to represent the
minor error category (short blinks). For example, ‘3.5’ indicates 3 long red blinks and 5 short white blinks to
communicate the processor is not detected.
Table 7-3
Interpreting POST diagnostic front panel lights and audible codes
Category
Major/minor code
Description
BIOS
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.
Interpreting system validation diagnostic front panel LEDs and audible codes
93