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HP Pavilion Series 3100/8000 BIOS / Motherboard POST Error Codes

QuickPOST SeriesPOST Error CodesUpdated 6/14/2019

Code

Meaning

02	Verify real mode
03	Disable NMI
04	Get processor type
06	Initialize system hardware
08	Initialize chipset with POST values
09	Set IN-POST flags
0A	Initialize CPU registers
0B	Enable CPU registers
0C	Initialize cache to POST values
0E	Initialize I/O component
0F	Initialize local IDE bus
10	Initialize power management
11	Load alternate registers
12	Restore CPU control word during warm boot
13	Initialize PCI bus mastering devices
14	Initialize keyboard controller
16	BIOS ROM checksum
17	Initialize cache before memory size
18	Initialize 8254 timer
1A	Initialize DMA controller
1C	Reset PIC
20	Test DRAM refresh
22	Test 8742 keyboard controller
24	Set ES segment register to 4GB
26	Enable A-20 line
28	Autosize DRAM
29	Initialize POST memory manager
2A	Clear 512K base RAM
2C	RAM address line failure
2E	RAM data failure, low byte
2F	Enable cache before BIOS shadow
30	RAM data failure, high byte
32	Test CPU, BUS clock frequency
33	Initialize POST dispatch manager
34	Test CMOS RAM
35	Initialize alternate chipset registers
36	Warm start shut-down
37	Reinitialize chipset (MB only)
38	Shadow system BIOS ROM
39	Reinitialize cache (MB only)
3A	Autosize cache
3C	Configure advanced chipset registers
3D	Load alternate registers new CMOS values
40	Set initial CPU speed
42	Initialize interrupts
44	Initialize BIOS interrupts
45	POST device initialization
46	Check ROM copyright notice
47	Initialize manager for PCI option ROM's
48	Check video config against CMOS
49	Initialize manager for PCI option ROM's
4A	Initialize all video adapters
4B	Display quiet boot screen
4C	Shadow video BIOS
4E	Display BIOS copyright notice
50	Display CPU type & speed
51	Initialize
52	Test keyboard
54	Set key click if enabled
56	Enable keyboard
58	Test for unexpected interrupts
59	Initialize POST display service
5A	Display "Press F2 to Enter Setup"
5B	Disable CPU cache
5C	Test RAM, 512-640K
60	Test extended memory
62	Test extended memory address lines
64	Jump to user patch 1
66	Configure advanced cache registers
67	Initialize multi-processor APIC
68	Enable external & processor caches
69	Set up SMM area
6A	Display external L2 cache size
6C	Display shadow area message
6E	Display high address for UMB recovery
70	Display error message
72	Check for configuration errors
74	Test real time clock
76	Check for keyboard errors
7A	Test for key lock on
7C	Set up hardware interrupt vectors
7E	Initialize coprocessor, if present
80	Disable onboard super I/O ports
81	Late POST device initialization
82	Detect & install external RS-232 ports
83	Configure non-MDC IDE controllers
84	Detect & install external parallel ports
85	Initialize PnP ISA devices
86	Reinitialize onboard I/O ports
87	Configure motherboard configurable devices
88	Initialize BIOS data area
89	Enable NMI's
8A	Initialize extended BIOS data area
8B	Test & initialize PS/2 mouse
8C	Initialize floppy controller
8F	Determine number of ATA drives
90	Initialize hard disk controllers
91	Initialize local BUS HD controllers
92	Jump to user patch 2
93	Build MPTABLE for multiprocessor boards
94	Disable A-20 line
95	Install CD-ROM for boot
96	Clear huge ES segment register
97	Fix up multiprocessor table
98	Search for options ROM's
99	Check for smart drive
9A	Shadow ROM option
9C	Set up power management
9E	Enable hardware interrupts
9F	Determine number of ATA & SCSI drives
A0	Set time of day
A2	Check key lock
A4	Initialize typematic rate
A8	Erase F2 prompt
AA	Scan for F2 keystroke
AC	Enter SETUP
AE	Clear IN-POST flag
B0	Check for errors
B2	POST done, prepare for boot
B4	One short beep before boot
B5	Terminate quiet boot
B6	Check password (optional)
B8	Clear global descriptor table
B9	Clean up all graphics
BA	Initialize DMI parameters
BB	Initialize PnP option ROM's
BC	Clear parity checkers
BD	Display multi boot menu
BE	Clear screen optional
BF	Check virus and backup reminders
C0	Try to boot with Int 19
C1	Initialize POST error manager
C2	Initialize error logging
C3	Initialize error display function
C4	Initialize system error handler
E0	Initialize the chipset
E1	Initialize the bridge
E2	Initialize the processor
E3	Initialize system timer
E4	Initialize system I/O
E5	Check force recovery boot
E6	Checksum BIOS ROM
E7	Got to BIOS
E8	Set huge segment
E9	Initialize multiprocessor
EA	Initialize OEM special code
EB	Initialize PIC & DMA
EC	Initialize memory type
ED	Initialize memory type
EE	Shadow boot block
EF	System memory test
F0	Initialize interrupt vectors
F1	Initialize runtime clock
F2	Initialize video
F3	Initialize beeper
F4	Initialize BOOT
F5	Clear huge segment
F6	Boot to mini-DOS
F7	Boot to full DOS