Lenovo ThinkPad 500 Hardware Maintenance Manual - Page 49

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Table 1. Numeric error codes (continued) Symptom or error FRU or action, in sequence 0250 System battery error-System battery is dead. 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. 0251 System CMOS checksum bad- Default configuration used. 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. 0252 Password checksum bad-The password is cleared. Reset the password by running BIOS Setup Utility. 0260 System timer error. 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. 0270 Real-time clock error. 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. 0271 Date and time error-Neither the date nor the time is set in the computer. Run BIOS Setup Utility to reset the time and date. 0280 Previous boot incomplete- Default configuration used. 1. Load "Setup Default" in BIOS Setup Utility. 2. DIMM. 3. System board. 02F0 CPU ID:xx Failed. 1. CPU. 2. System board. 02F4 EISA CMOS not writable. 1. Load Setup Defaults in BIOS Setup Utility. 2. Replace the backup battery. 3. System board. 02F5 DMA test failed. 1. DIMM. 2. System board. 02F6 Software NMI failed 1. DIMM. 2. System board. 02F7 Fail-safe timer NMI failed 1. DIMM. 2. System board. 1802 Unauthorized network card is plugged in-Turn off and remove the miniPCI network card. 1. Remove Mini PCI network card. 2. System board. 1803 1. Remove the daughter card that you Unauthorized daughter card is plugged installed. in-Turn off and remove the daughter card. 2. System board. Related service information 41

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Table
1.
Numeric
error
codes
(continued)
Symptom
or
error
FRU
or
action,
in
sequence
0250
System
battery
error—System
battery
is
dead.
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.
0251
System
CMOS
checksum
bad—
Default
configuration
used.
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.
0252
Password
checksum
bad—The
password
is
cleared.
Reset
the
password
by
running
BIOS
Setup
Utility.
0260
System
timer
error.
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.
0270
Real-time
clock
error.
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.
0271
Date
and
time
error—Neither
the
date
nor
the
time
is
set
in
the
computer.
Run
BIOS
Setup
Utility
to
reset
the
time
and
date.
0280
Previous
boot
incomplete—
Default
configuration
used.
1.
Load
“Setup
Default”
in
BIOS
Setup
Utility.
2.
DIMM.
3.
System
board.
02F0
CPU
ID:xx
Failed.
1.
CPU.
2.
System
board.
02F4
EISA
CMOS
not
writable.
1.
Load
Setup
Defaults
in
BIOS
Setup
Utility.
2.
Replace
the
backup
battery.
3.
System
board.
02F5
DMA
test
failed.
1.
DIMM.
2.
System
board.
02F6
Software
NMI
failed
1.
DIMM.
2.
System
board.
02F7
Fail-safe
timer
NMI
failed
1.
DIMM.
2.
System
board.
1802
Unauthorized
network
card
is
plugged
in—Turn
off
and
remove
the
miniPCI
network
card.
1.
Remove
Mini
PCI
network
card.
2.
System
board.
1803
Unauthorized
daughter
card
is
plugged
in—Turn
off
and
remove
the
daughter
card.
1.
Remove
the
daughter
card
that
you
installed.
2.
System
board.
Related
service
information
41