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Table 2. Numeric error codes (continued)
Symptom or error (beeps, if any)
FRU or action, in sequence
0251
System CMOS checksum bad—Default conguration
used.
(two short beeps)
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 (ThinkPad Setup for ThinkPad X120e) to reset
the time and date.
0254
System NV7 Volume checksum bad—Default
conguration used
(two short beeps)
Turn off the computer and discharge CMOS. Then
restart the computer.
0260
System timer error.
(two short beeps)
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 (ThinkPad Setup for ThinkPad X120e) to reset
the time and date.
3. System board.
0270
Real-time clock error.
(two short beeps)
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 (ThinkPad Setup for ThinkPad X120e) to reset
the time and date.
3. System board.
0271
Date and time error— either the date nor the time is set in
the computer.
(two short beeps)
Run BIOS Setup Utility (ThinkPad Setup for ThinkPad
X120e) to reset the time and date.
0280
Previous boot incomplete—Default conguration used.
(two short beeps)
1. Load “Setup Default” in BIOS Setup Utility
(ThinkPad Setup for ThinkPad X120e).
2. DIMM.
3. System board.
02D0
System cache error.
(two short beeps)
1. CPU.
2. System board.
02F0
CPU ID:xx Failed.
1. CPU.
2. System board.
02F5
DMA test failed.
(two short beeps)
1. DIMM.
2. System board.
02F6
Software NMI failed
(two short beeps)
1. DIMM.
2. System board.
02F7
Fail-safe timer NMI failed
(two short beeps)
1. DIMM.
2. System board.
1802
Unauthorized network card is plugged in—Turn off and
remove the miniPCI network card.
(two short beeps)
1. Remove the Mini PCI network card.
2. System board.
1804
Unauthorized WAN card is plugged in—Power off and
remove the WAN card.
1. Remove the wireless WAN card.
2. System board.
Chapter 4. Related service information 35