HP PAVILION Pavilion ZE4300 Service Manual page 118

Beep Codes
1-2-1-4
1-2-2-1
1-2-2-3
1-2-2-4
1-2-3-1
1-2-3-3
1-2-4-1
1-3-1-1
1-3-1-3
1-3-2-1
1-3-3-1
1-3-3-2
1-3-3-3
1-3-4-1
1-3-4-3
1-3-4-4
1-4-1-1
1-4-1-3
1-4-1-4
1-4-2-3
1-4-3-1
1-4-3-3
1-4-4-1
1-4-4-2
2-1-1-2
2-1-1-3
2-1-2-2
2-1-2-3
2-1-2-4
2-1-3-1
2-1-3-2
2-1-3-3
2-1-3-4
2-1-4-1
2-1-4-3
2-1-4-4
2-2-1-1
2-2-1-2
2-2-1-3
2-2-2-1
2-2-2-2
2-2-3-1
2-2-3-2
2-2-3-3
2-2-3-4
2-2-4-1
2-3-1-1
2-3-1-3
2-3-2-1
2-3-2-3
Service Manual
POST Description
Initialize PCI Bus Mastering devices
Initialize keyboard controller
BIOS ROM checksum
Initialize cache before memory Auto size
8254 timer initialization
8237 DMA controller initialization
Reset Programmable Interrupt Controller
Test DRAM refresh
Test 8742 Keyboard Controller (on motherboard)
Set ES segment register to 4 GB
Auto size DRAM; or wrong type or no RAM installed
Initialize POST Memory Manager
Clear 512 KB base RAM
RAM failure on address line xxxx
RAM failure on data bits xxxx of low byte of memory bus
Enable cache before system BIOS shadow
RAM failure on data bits xxxx of high byte of memory bus
Test CPU bus-clock frequency
Initialize Phoenix Dispatch Manager
Warm start shut down
Shadow system BIOS ROM
Auto size cache
Advanced configuration of chipset registers
Load alternate registers with CMOS values
Initialize extended memory for ROMPilot
Initialize interrupt vectors
POST device initialization
Check ROM copyright notice
Initialize I20 support
Check video configuration against CMOS
Initialize PCI bus and devices
Initialize all video adapters in system
QuietBoot start (optional)
Shadow video BIOS ROM
Display BIOS copyright notice
Initialize MultiBoot
Display CPU type and speed
Initialize EISA board
Test keyboard
Set key Select if enabled
Enable USB devices
Test for unexpected interrupts
Initialize POST display service
F2
Display prompt "Press to enter SETUP"
Disable CPU cache
Test RAM between 512 and 640 KB
Test extended memory
Test extended memory address lines
Jump to UserPatch1
Configure advanced cache registers
Troubleshooting and Diagnostics 3-21