Compaq 12XL125 - Presario - K6-2 533 MHz Maintenance & Service Manual page 78

Code Beeps
49h
4Ah
4Bh
4Ch
4Eh
50Eh
51h
52h
54h
58h
59h
5Ah
5Bh
5Ch
60h
62h
64h
66h
67h
68h
69h
6Ah
6Bh
6Ch
6Eh
70h
72h
76h
7Ch
7Eh
80h
36 T
ROUBLESHOOTING
Presario 1200 Series
Models: XL101-XL113, XL115, XL118-XL127
POST Routine Description
Initialize all video adapters in system
QuietBoot start (optional)
Shadow video BIOS ROM
Display BIOS copyright notice
Display CPU type and speed
Initialize EISA board
Test keyboard
Set key click if enabled
Test for unexpected interrupts
Initialize POST display service
Display prompt "Press F2 to enter SetUP"
Disable CPU cache
Test RAM between 512 and 640 KB
Test extended memory
Test extended memory address lines
Jump to UserPatchI
Configure advanced cache registers
Initialize Multi Processor APIC
Enable external and CPU cache
Setup System Management Mode (SMM) area
Display external L2 cache size
Load custom defaults (optional)
Display shadow-area message
Display possible high address for UMB recovery
Display error messages
Check for configuration errors
Check for keyboard errors
Set up hardware interrupt vectors
Initialize coprocessor if present
Disable onboard Super I/O ports and IRQs
Late POST device initialization
P N M
RESARIO OTEBOOK AINTENANCE AND
S G 1200XL S
ERVICE UIDE ERIES