3-24
Troubleshooting and Diagnostics
Service Manual
Beep Codes
POST Description
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 Select 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