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Power On Self Test

OCCURRENCE OF 
TROUBLE

Automatic diagnosis takes 
place when the power switch
is set to ON.

Power sw is set to ON.

POST NORMAL 
FINISH

POST ERROR 
OCCURRENCE

DEFECTIVE PARTS 
SORTING

SELF-DIAGNOSIS TEST (IF REQUIRED)
Conduct a self diagnosis test when
it is necessary for conduct
trouble diagnosis.

TROUBLESHOOTING
Defective parts are sorted by
referring to symptoms.

SELF-DIAGNOSIS TEST
After repair, conduct a self-
diagnosis test and make sure that the
repaired set operates properly.

DISASSEMBLY PROCEDURE
Replace defective parts.

REPAIR WORK

INSPECTION

TEST FAILED

TEST OK

END OF 
REPAIR WORK

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The following is a list of the messages that BIOS can display. Most of them occur during POST. Some of them display 
information about a hardware device, e.g., the amount of memory installed. Others may indicate a problem with a device, 
such as the way it has been configured. Following the list are explanations of the messages and remedies for reported 
problems.
If your system displays one of except the messages marked below with an asterisk (*), write down the message and 
contact Panasonic Technical Support. If your system fails after you make changes in the Setup menus, reset the 
computer, enter Setup and install Setup defaults or correct the error.

Fixed disk in not working or not configured properly. Check to see if fixed disk is attached properly. Run Setup. Find out if 
the fixed-disk type is correctly identified.

Stuck key on keyboard.

Keyboard not working.

Keyboard controller failed test. May require replacing keyboard controller.

Unlock the system to proceed.

System RAM failed at offset nnnn of in the 64k block at which the error was detected.

Shadow RAM failed at offset nnnn of the 64k block at which the error was detected.

Extended memory not working or not configured properly at offset nnnn.

The CMOS clock battery indicator shows the battery is dead. Replace the battery and run Setup to reconfigure the 
system.

System CMOS has been corrupted or modified incorrectly, perhaps by an application program that changes data stored in 
CMOS. The BIOS installed Default SETUP Values. If you do not want these values, enter Setup and enter your own 
values. If the error persists, check the system battery or contact Panasonic Technical Support.

The timer test failed. Requires repair of system board.

Real-time clock fails BIOS test. May require board repair.

Previous POST did not complete successfully. POST loads default values and offers to run Setup. If the failure was 
caused by incorrect values and they are not corrected, the next boot will likely fail. On systems with control of wait states, 
improper Setup settings can also terminate POST and cause this error on the next boot. Run Setup and verify that the 
wait-state configuration is correct. This error is cleared the next time the system is booted.

Memory size found by POST differed from EISA CMOS.

Drive A: or B: is present but fails the BIOS POST diskette tests. Check to see that the drive is defined with the proper 
diskette type in Setup and that the diskette drive is attached correctly.

Type of floppy drive A: not correctly identified in Setup.

Type of floppy drive B: not correctly identified in Setup.

Contact Panasonic Technical Support.

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CPU socket number for Multi-Processor error.

ServerBIOS2 test error: Cannot write to EISA CMOS.

ServerBIOS2 test error: Cannot write to extended DMA (Direct Memory Access) registers.

ServerBIOS2 test error: Cannot generate software NMI (Non-Maskable Interrupt).

ServerBIOS2 test error: Fail-Safe Timer takes too long.

Address conflict for specified

 device.

Run ISA or EISA Configuration Utility to resolve resource conflict for the specified

 device.

The hex number nnnn is a map of the bits at the RAM address which failed the memory test. Each 1 (one) in the map 
indicates a failed bit. See error 230,231 or 232 for offset address of the failure in System, Extended or Shadow memory.

Problem with NVRAM (CMOS) data.

I/O device IRQ conflict error.

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 is a method for checking errors in binary data. A parity error indicates that some data 
has been corrupted.

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 a Setup and 
change the settings. Write down and follow the information shown on the screen.

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