Error Messages
Table 37. BIOS Error Messages (continued)
Error Message
Invalid NVRAM media type
Keyboard controller error
Keyboard error
Keyboard error nn
Keyboard locked - Unlock key
switch
Monitor type does not match
CMOS - Run SETUP
Operating system not found
Parity Check 1
Parity Check 2
Press <F1> to resume, <F2> to
Setup
Real time clock error
Shadow RAM Failed at offset:
nnnn
System battery is dead -
Replace and run SETUP
System cache error - Cache
disabled
System CMOS checksum bad -
run SETUP
System RAM Failed at offset:
nnnn
System timer error
54
Explanation
Problem with NVRAM (CMOS) access.
The keyboard controller failed test. Try replacing the keyboard.
Keyboard not working.
BIOS discovered a stuck key and displays the scan code nn for the stuck
key.
Unlock the system to proceed.
Monitor type not correctly identified in Setup.
Operating system cannot be located on either drive A: or drive C:. Enter
Setup and see if fixed disk and drive A: are properly identified.
Parity error found in the system bus. BIOS attempts to locate the
address and display it on the screen. If it cannot locate the address, it
displays ????.
Parity error found in the I/O bus. BIOS attempts to locate the address
and display it on the screen. If it cannot locate the address, it displays
????.
Displayed after any recoverable error message. Press <F1> to start the
boot process or <F2> to enter Setup and change any settings.
Real-time clock fails BIOS test. May require motherboard repair.
Shadow RAM failed at offset nnnn of the 64 KB block at which the error
was detected.
The CMOS clock battery indicator shows the battery is dead. Replace
the battery and run Setup to reconfigure the system.
RAM cache failed the BIOS test. BIOS disabled the cache.
System CMOS RAM has been corrupted or modified incorrectly, perhaps
by an application program that changes data stored in CMOS. Run Setup
and reconfigure the system either by getting the default values and/or
making your own selections.
System RAM failed at offset nnnn of the 64 KB block at which the error
was detected.
The timer test failed. Requires repair of system motherboard.
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