Table of Contents
Advertisement
Error Message
No beep, power indicator turns on, the LCD
screen is blank, but you can view POST
when connected to an external CRT.
No beep, power indicator turns on and a
blinking cursor appears on screen during
POST.
No beep during POST but system runs
correctly.
POST Beep Codes
Code
02h
03h
04h
06h
08h
09h
0Ah
0Bh
0Ch
0Eh
0Fh
10h
11h
12h
13h
14h
16h
17h
18h
1Ah
1Ch
20h
22h
24h
26h
28h
29h
2Ah
2Ch
70
Reconnect the LCD-CCD cable.
LCD-CCD cable
Inverter board
LCD panel
System board
Ensure every internal cables are properly and securely
connected.
System board
Speaker
System board
Beeps
1-2-2-3
1-3-1-1
1-3-1-3
1-3-4-1
FRU/Action in Sequence
POST Routine Description
Verify Real Mode
Disable Non-Maskable Interrupt (NMI)
Get CPU type
Initialize system hardware
Initialize chipset with initial POST values
Set IN POST flag
Initialize CPU registers
Enable CPU cache
Initialize caches to initial POST values
Initialize I/O component
Initialize the local bus IDE
Initialize Power Management
Load alternate registers with initial POST
values
Restore CPU control word during warm
boot
Initialize PCI Bus Mastering devices
Initialize keyboard controller
BIOS ROM checksum
Initialize cache before memory autosize
8254 timer initialization
8237 DMA controller initialization
Reset Programmable Interrupt Controller
Test DRAM refresh
Test 8742 Keyboard Controller
Set ES segment register to 4 GB
Enable A20 line
Autosize DRAM
Initialize POST Memory Manager
Clear 215 KB base RAM
RAM failure on address line xxxx
Chapter 1
Advertisement
Table of Contents
