Lenovo 019923U Hardware Maintenance Manual page 50

Table 2. Numeric error codes (continued)
Symptom or error (beeps, if any)
0251
System CMOS checksum bad— Default configuration
used.
(two short beeps)
0254
System NV7 Volume checksum bad- Default configuration
used
(two short beeps)
0260
System timer error.
(two short beeps)
0270
Real-time clock error.
(two short beeps)
0271
Date and time error—Neither the date nor the time is set
in the computer.
(two short beeps)
0280
Previous boot incomplete— Default configuration used.
(two short beeps)
02D0
System cache error.
(two short beeps)
02F0
Microprocessor ID:xx Failed.
02F5
DMA test failed.
(two short beeps)
02F6
Software NMI failed
(two short beeps)
02F7
Fail-safe timer NMI failed
(two short beeps)
1802
Unauthorized network card is plugged in—Turn off and
remove the miniPCI network card.
(two short beeps)
1804
Unauthorized WAN card is plugged in—Power off and
remove the WAN card.
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Hardware Maintenance Manual
FRU or action, in sequence
1. Charge the backup battery for more than 8 hours
by connecting the ac adapter.
2. Replace the backup battery and run BIOS Setup
Utility to reset the time and date.
Turn off the computer and discharge CMOS. Then
restart the computer.
1. Charge the backup battery for more than 8 hours
by connecting the ac adapter.
2. Replace the backup battery and run BIOS Setup
Utility to reset the time and date.
3. System board.
1. Charge the backup battery for more than 8 hours
by connecting the ac adapter.
2. Replace the backup battery and run BIOS Setup
Utility to reset the time and date.
3. System board.
Run BIOS Setup Utility to reset the time and date.
1. Load "Setup Default" in BIOS Setup Utility.
2. Memory module.
3. System board.
1. Microprocessor.
2. System board.
1. Microprocessor.
2. System board.
1. Memory module.
2. System board.
1. Memory module.
2. System board.
1. Memory module.
2. System board.
1. Remove the Mini PCI network card.
2. System board.
1. Remove the wireless WAN card.
2. System board.