| Message |
Definition |
Probable Causes |
8042
Gate - A20 Error |
Gate A20 of keyboard controller is
faulty. |
Defective system board. |
| Address Line Short! |
Address decoding not properly executed
on system board. |
Defective system board. |
| C: Drive Error |
No response from drive C. |
Incorrect drive settings in system setup
program. |
| C: Drive Failure |
Drive C failed. |
Drive C needs reformatting.
Drive interface or power cable not properly connected.
Defective drive interface or power cable.
Defective drive C. |
| Cache Memory Bad. Do Not Enable
Cache! |
Cache memory subsystem not functioning
properly. |
Defective microprocessor. |
| CH-2 Timer Error |
Error occurred in system timer 2. |
Defective system board. |
| CMOS Battery State Low |
System battery not maintaining contents
of NVRAM. |
System battery at or near depletion of
its charge. |
| CMOS Checksum Failure |
NVRAM checksum value changed since NVRAM
contents were saved. |
Battery charge may be low, or BIOS may
be corrupted. |
| CMOS Display Type Mismatch |
Video types detected by system BIOS and
saved in NVRAM do not match. |
Video type detected by system BIOS does
not match type actually installed. |
| CMOS Memory Size Mismatch |
Amount of main memory installed on
system board does not match amount reflected by NVRAM. |
Amount of main memory detected by system
BIOS does not match amount actually installed. |
| CMOS System Options Not Set |
System option parameters in NVRAM not
set. |
One or more configuration settings in
system setup program are corrupted or improperly set. |
| CMOS Time and Date Not Set |
System configuration settings for time
and date in system setup program appear to be incorrect. |
System Time and/or System Date
categories in system setup program need resetting. |
| D: Drive Error |
No response from drive D. |
Incorrect drive settings in system setup
program. |
| D: Drive Failure |
Drive D failed. |
Drive D needs reformatting.
Drive interface or power cable not properly connected.
Defective drive interface or power cable.
Defective drive D. |
| Diskette Boot Failure |
System cannot boot from diskette in
drive A. |
Diskette in drive A does not contain
bootable operating system, or bootable operating system
is corrupt. |
| DMA #1 Error |
Error condition occurred in DMA channel
1. |
Defective system board. |
| DMA #2 Error |
Error condition occurred in DMA channel 2. |
Defective system board. |
| DMA Bus Time-Out |
Device has driven DMA bus signal longer
than allowable 7.8 microseconds. |
Defective system board. |
| DMA Error |
Error condition occurred in DMA
controller. |
Defective system board. |
| FDD Controller Failure |
System BIOS cannot communicate with
diskette/tape drive controller. |
Defective system board. |
| HDD Controller Failure |
System BIOS cannot communicate with EIDE
hard-disk drive interface or installed hard-disk drive
controller card. |
Defective hard-disk drive controller
card (if one is installed).
Defective system board.
Incorrect disk settings in system setup program. |
| INTR #1 Error |
Failure detected in interrupt channel 1
during POST. |
Defective system board. |
| INTR #2 Error |
Failure detected in interrupt channel 2
during POST. |
Defective system board. |
| Invalid Boot Diskette |
System cannot boot from diskette in
drive A. |
Diskette in drive A contains no
operating system.
Diskette in drive A is faulty.
Drive A interface or power cable faulty or improperly
connected.
Drive A defective. |
| KB/Interface Error |
Error detected at keyboard connector. |
Keyboard improperly connected or faulty. |
| Keyboard Error |
Keyboard has timing problem. |
Keyboard improperly connected or faulty. |
| Keyboard Is Locked...Unlock It |
System cannot communicate with keyboard. |
Keyboard improperly connected or faulty. |
| Uncorrectable ECC Error |
ECC detected a multiple-bit error it
could not correct. |
A SIMM is faulty. |
