90 Chapter 4
2-3-3-1 68h Enable external and CPU
caches.
• Check the secondary cache.
• Check the processor.
• Check the main board.
2-3-3-2 69h Initialize SMI handler. • Check the main board.
2-3-3-3 6Ah Display external cache
size.
• Check the video card.
• Check the main board.
2-3-4-1 6Ch Display shadow message. • Check the video card.
• Check the main board.
2-3-4-3 6Eh Display non-disposable
segments.
• Check the video card.
• Check the main board.
2-4-1-1 70h Display error messages. • Check the video card.
• Check the main board.
2-4-1-3 72h Check for configuration
errors.
• Check the main board.
2-4-2-1 74h Test real-time clock. • Check the main board.
2-4-2-3 76h Check for keyboard
errors.
• Check the keyboard.
• Check the keyboard controller.
• Check the main board.
2-4-4-1 7Ch Set up hardware
interrupts vectors.
• Treat as an expansion card problem.
• Check the main board.
2-4-4-3 7Eh Test coprocessor if
present.
• Check the processor.
• Check the main board.
3-1-1-1 80h Disable onboard I/O
ports.
• Treat as an expansion card problem.
• Check the serial port(s).
• Check the parallel port(s).
• Check the main board.
3-1-1-3 82h Detect and install
external RS232 ports.
• Treat as an expansion card problem.
• Check the serial port(s).
• Check the parallel port(s).
• Check the main board.
3-1-2-1 84h Detect and install
external parallel ports.
• Treat as an expansion card problem.
• Check the serial port(s).
• Check the parallel port(s).
• Check the main board.
3-1-2-3 86h Reinitialize onboard I/O
ports.
• Treat as an expansion card problem.
• Check the serial port(s).
• Check the parallel port(s).
• Check the main board.
3-1-3-1 88h Initialize BIOS data area. • Check the main board.
3-1-3-3 8Ah Initialize extended BIOS
data area.
• Check the main board.
3-1-4-1 8Ch Initialize floppy
controller.
• Check the HDD.
• Check the floppy disk drive(s).
• Check the main board.
Beep Code Post Code Description What to Check (Recommended)
