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If an error occurs after the display device is initialized, the error message is
displayed. A prompt to press <F1> will appear with the displayed error message.
Error Message Explanation
8042 Gate - A20 Error Gate A20 on the keyboard controller (8042) is not
working. Replace the 8042.
Address Line Short Errors in the address decoding circuitry.
C: Drive Error Hard disk drive C: does not respond. Check the C:
hard disk type in the Standard Setup.
C: Drive Failure Hard disk drive C: does not respond. Replace the hard
disk.
Cache Memory Bad, Do Not
Enable Cache.
Cache memory is defective. Replace it.
CH-2 Timer Error Most ISA computers 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 the BIOS Setup.
CMOS System Options Not
Set
The values stored in CMOS RAM are either corrupt or
nonexistent. Run the BIOS Setup.
CMOS Display Type
Mismatch
The video type in CMOS RAM does not match the type
detected by the BIOS. Run the BIOS Setup.
CMOS Memory Size
Mismatch
The amount of memory is different from the amount in
CMOS RAM.
CMOS Time and Date Not
Set
Run Standard Setup to set the date and time in CMOS
RAM.
D: Drive Error Hard disk drive D: does not respond. Check the D:
hard disk type in the Standard Setup.
D: Drive Failure Hard disk drive D: does not respond. Replace the hard
disk.
Diskette Boot Failure The boot disk in floppy disk A: is corrupt. It can not be
used to boot the computer. Use another boot disk and
follow the screen instructions.
Display Switch Not Proper Some computers require a video switch be set to either
color or monochrome. Turn the computer 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.
FDD Controller Failure The BIOS can not communicate with the floppy disk
drive controller. Check all appropriate connections after
the computer is powered down.
HDD Controller Failure The BIOS can not communicate with the hard disk
drive controller. Check all appropriate connections after
the computer is powered down.
INTR#1 Error Interrupt channel 1 failed POST.
INTR#2 Error Interrupt channel 2 failed POST.