HP BOOK XE4500 manual Test 8742 Keyboard Controller on motherboard

Beep Codes*	POST Description
1-3-1-3	Test 8742 Keyboard Controller (on motherboard).
1-3-2-1	Set ES segment register to 4 GB.
1-3-3-1	Auto size DRAM; or wrong type or no RAM installed.
1-3-3-2	Initialize POST Memory Manager.
1-3-3-3	Clear 512 kB base RAM.
1-3-4-1	RAM failure on address line xxxx.
1-3-4-3	RAM failure on data bits xxxx of low byte of memory bus.
1-3-4-4	Enable cache before system BIOS shadow.
1-4-1-1	RAM failure on data bits xxxx of high byte of memory bus.
1-4-1-3	Test CPU bus-clock frequency.
1-4-1-4	Initialize Phoenix Dispatch Manager.
1-4-2-3	Warm start shut down.
1-4-3-1	Shadow system BIOS ROM.
1-4-3-3	Auto size cache.
1-4-4-1	Advanced configuration of chipset registers.
1-4-4-2	Load alternate registers with CMOS values.
2-1-1-2	Initialize extended memory for RomPilot.
2-1-1-3	Initialize interrupt vectors.
2-1-2-2	POST device initialization.
2-1-2-3	Check ROM copyright notice.
2-1-2-4	Initialize I20 support.
2-1-3-1	Check video configuration against CMOS.
2-1-3-2	Initialize PCI bus and devices.
2-1-3-3	Initialize all video adapters in system.
2-1-3-4	QuietBoot start (optional).
2-1-4-1	Shadow video BIOS ROM.
2-1-4-3	Display BIOS copyright notice.
2-1-4-4	Initialize MultiBoot.
2-2-1-1	Display CPU type and speed.
2-2-1-2	Initialize EISA board.
2-2-1-3	Test keyboard.
2-2-2-1	Set key click if enabled.
2-2-2-2	Enable USB devices.
2-2-3-1	Test for unexpected interrupts.
2-2-3-2	Initialize POST display service.
2-2-3-3	Display prompt "Press F2 to enter SETUP".
2-2-3-4	Disable CPU cache.
2-2-4-1	Test RAM between 512 and 640 kB.
2-3-1-1	Test extended memory.
2-3-1-3	Test extended memory address lines.
2-3-2-1	Jump to UserPatch1.
2-3-2-3	Configure advanced cache registers.
2-3-2-4	Initialize Multi Processor APIC.
2-3-3-1	Enable external and CPU caches.
2-3-3-2	Set up System Management Mode (SMM) area.
2-3-3-3	Display external L2 cache size.
2-3-3-4	Load custom defaults (optional).
2-3-4-1	Display shadow-area message.
2-3-4-3	Display possible high address for UMB recovery.
2-4-1-1	Display error messages.
2-4-1-3	Check for configuration errors.
2-4-2-3	Check for keyboard errors.
2-4-4-1	Set up hardware interrupt vectors.
2-4-4-2	Initialize Intelligent System Monitoring.
2-4-4-3	Initialize coprocessor if present.
3-1-1-1	Disable onboard Super I/O ports and IRQs.
3-1-1-2	Late POST device initialization.
3-1-1-3	Detect and install external RS232 ports.
3-1-1-4	Configure non-MCD IDE controllers.
3-1-2-1	Detect and install external parallel ports.
3-1-2-2	Initialize PC-compatible PnP ISA devices.
3-1-2-3	Re-initialize onboard I/O ports.
3-1-2-4	Configure Motherboard Configurable Devices (optional).
3-1-3-1	Initialize BIOS Data Area.
3-1-3-2	Enable Non-Maskable Interrupts (NMIs).
3-1-3-3	Initialize Extended BIOS Data Area.
3-1-3-4	Test and initialize PS/2 mouse.
3-1-4-1	Initialize floppy controller.
3-1-4-4	Determine number of ATA drives (optional).
3-2-1-1	Initialize hard-disk controllers.
3-2-1-2	Initialize local-bus hard-disk controllers.
3-2-1-3	Jump to UserPatch2.

HP Omnibook XE4100/XE4500 Troubleshooting and Diagnostics 3-21