Error Messages and Beep Codes
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4.3 BIOS Error Messages
Error Message Explanation
8042 Gate - A20 Error Gate A20 on the keyboard controller is not working.
Address Line Short! Error in the address decoding circuitry on the motherboard.
CH-2 Timer Error There is an error in Counter/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 Setup.
CMOS System Options Not Set The values stored in CMOS RAM are either corrupt or nonexistent. Run Setup.
CMOS Memory Size Mismatch The amount of memory on the motherboard is different than the amount
indicated in CMOS RAM. Run Setup.
CMOS Time and Date Not Set Run 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.
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 cannot communicate with the floppy disk drive controller. Check all
appropriate connections after the system is powered down.
HDD Controller Failure The BIOS cannot communicate with the hard disk drive controller. Check all
appropriate connections after the system is powered down.
INTR #1 Error Interrupt channel 1 failed POST.
INTR #2 Error Interrupt channel 2 failed POST.
Invalid Boot Diskette The BIOS can read the disk in floppy drive A, but cannot boot the system from
it. Use another boot disk.
KB/Interface Error There is an error in the keyboard connector.
Off Board Parity Error Parity error in memory installed in an expansion slot. The format is:
OFF BOARD PARITY ERROR ADDR (HEX) = (XXXX)
where XXXX is the hex address where the error occurred.
Parity Error Parity error in system memory at an unknown address.
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