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Message Possible Cause
KEYBOARD FAILURE The keyboard failed to respond to the
RESET ID Command.
MACHINE IS LOCKED - TURN KEY The system will not continue the boot
sequence until you insert the key into the
key lock and turn it.
NO BOOTABLE FLOPPY DRIVE 0 INSTALLED No bootable floppy drive was detected.
Possible solutions: 1) Power down the
system and check all appropriate
connections, cables, etc. 2) In
configurations where no floppy drive is
installed, run System Configuration Utility
and make sure the diskette drive
configuration item is set to “None”. 3)
Replace the diskette drive if necessary.
NO INTERRUPTS FROM TIMER 0 The periodic timer interrupt is not
occurring.
RAM PARITY ERROR AT LOCATION xxxx A RAM parity error occurred at the
specified (hexadecimal) location.
ROM AT xxxx (LENGTH YYYY) WITH NON-ZERO
CHECKSUM (zz)
An illegal adapter ROM was located at
the specified address. An external
adapter (such as a video card) may be
causing a conflict.
TIME/DATE CORRUPT - RUN SCU The time and date stored in the real time
clock have been corrupted, possibly by a
power loss.
UNEXPECTED AMOUNT OF MEMORY - RUN SCU The amount of memory detected by
POST does not match the amount
specified in CMOS RAM.
CMOS RAM TEST FAILED A walking built test of CMOS RAM
locations 0E (Hex) - 3F (Hex) failed.
DMA CONTROLLER FAULTY A sequential read/write of the transfer
count and transfer address registers
within the primary and secondary DMA
controllers failed.
FAULTY DMA PAGE REGISTERS A walking bit read/write of the 16 DMA
controller page registers starting at
location 80 Hex failed.
FAULTY REFRESH CIRCUIT A continuous read/write test of port 61h
found that bit 4 (Refresh Detect) failed to
toggle within an allotted amount of time.
INTERRUPT CONTROLLER FAILED A sequential read/write of various
Interrupt Controller registers failed.
ROM CHECKSUM INCORRECT A checksum of the ROM BIOS does not
match the byte value at F000:FFFF.