Appendix I Error messages and Beep Codes

Errors can occur during POST (Power On Self Test) which is performed every time the system is powered on. Fatal errors, which prevent the system to continue the boot process, are communicated through a series of audible beeps. Other errors are displayed in the following format:

ERROR Message Line 1

ERROR Message Line 2

For most displayed error messages, there is only one message. If a second message appears, it is "RUN SETUP". If this message occurs, press <F1> to run AMIBIOS Setup.

BEEP CODES

Beeps

Error Message

Description

1

Refresh Failure

The memory refresh circuitry on the baseboard is faulty.

2

Parity Error

Parity is not supported on this product, will not occur.

3

Base 64 KB Memory Failure

Memory failure in the first 64 KB.

4

Timer Not Operational

Memory failure in the first 64 KB of memory, or Timer 1 on the baseboard is

 

 

not functioning.

5

Processor Error

The CPU on the baseboard generated an error.

6

8042 - Gate A20 Failure

The keyboard controller (8042) may be bad. The BIOS cannot switch to

 

 

protected mode.

7

Processor Exception Interrupt Error

The CPU generated an exception interrupt.

8

Display Memory Read/Write Error

The system video adapter is either missing or its memory is faulty. This is

 

 

not a fatal error.

9

ROM Checksum Error

ROM checksum value does not match the value encoded in BIOS.

10

CMOS Shutdown Register Rd/Wrt Error

The shutdown register for CMOS RAM failed.

11

Cache Error / External Cache Bad

The external cache is faulty.

 

 

Table I-1. Beep Codes

ERROR MESSAGES

Error Message

Explanation

8042 Gate - A20 Error

Gate A20 on the keyboard controller (8042) is not working. Replace the 8042.

Address Line Short!

Error in the address decoding circuitry on the baseboard.

Cache Memory Bad, Do Not Enable Cache!

Cache memory is defective. Replace it.

CH-2 Timer Error

Most AT systems include two timers. There is an error in timer 2.

CMOS Battery State Low

CMOS RAM is powered by a battery. The battery power is low. Replace the

 

battery.

CMOS Checksum Failure

After CMOS RAM values are saved, a checksum value is generated for error

 

checking. The previous value is different from the current value. Run AMIBIOS

 

Setup.

CMOS System Options Not Set

The values stored in CMOS RAM are either corrupt or nonexistent. Run Setup.

CMOS Display Type Mismatch

The video type in CMOS RAM does not match the type detected by the BIOS.

 

Run AMIBIOS Setup.

CMOS Memory Size Mismatch

The amount of memory on the baseboard is different than the amount in CMOS

 

RAM. Run AMIBIOS Setup.

CMOS Time and Date Not Set

Run Standard CMOS Setup to set the date and time in CMOS RAM.

Diskette Boot Failure

The boot disk in floppy drive A: is corrupt. It cannot be used to boot the system.

 

Use another boot disk and follow the screen instructions.

Display Switch Not Proper

Some systems require a video switch on the baseboard be set to either color or

 

monochrome. Turn the system off, set the switch, then power on.

DMA Error

Error in the DMA controller.

DMA #1 Error

Error in the first DMA channel.

DMA #2 Error

Error in the second DMA channel.

 

Table I-2. Error Messages

Advanced/ZP Technical Product Summary Page 34

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Intel 281786-002 manual Appendix I − Error messages and Beep Codes, Error Messages

281786-002 specifications

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