Lenovo ThinkPad A21e English - A21e(2655) Service and Troubleshooting Guide - Page 20

Diagnosing problems, Message, Cause and action, Saving Changes, Restart - cmos battery

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Solving computer problems Message Cause and action 0220: Monitor type error The monitor type does not match the type specified in CMOS. Run the IBM BIOS Setup Utility to make sure that your monitor type matches the type specified in the utility. 0230: Shadow RAM error The shadow RAM failed. Test your computer's memory with PC-Doctor. If you added a memory module just before turning the computer on, reinstall it. Then test the memory with PC-Doctor. 0231: System RAM error The system RAM failed. Test your computer's memory with PC-Doctor. If you added a memory module just before turning the computer on, reinstall it. Then test the memory with PC-Doctor. 0232: Extended RAM error The extended RAM failed. Test your computer's memory with PC-Doctor. If you increased memory just before turning the computer on, reinstall it. Then test the memory with PC-Doctor. 0250: System battery error The system battery is dead. Replace the battery and run the IBM BIOS Setup Utility to verify the configuration. If you still have a problem, have the computer serviced. 0251: System CMOS checksum bad The system CMOS may have been corrupted by an application program. The computer uses the default settings. Run the BIOS Setup Utility to reconfigure the settings. If you still see the same error code, have the computer serviced. 0252: Password checksum bad The password you have set has been cleared. Run the BIOS Setup Utility to set the password. 0260: System timer error Have the computer serviced. 0270: Real time clock error Have the computer serviced. 0271: Date and time error Neither the date nor the time is set in the computer. Set the date and time, using the IBM BIOS Setup Utility. 0280: Previous boot incomplete Your computer was previously unable to complete the boot process. Turn the computer off; then turn it on to start the IBM BIOS Setup Utility. Verify the configuration and then restart the computer either by choosing the Exit Saving Changes option under the Restart item or by pressing F10. If you still see the same error code, have the computer serviced. 02D0: System cache error The cache is disabled. Have the computer serviced. 02F4: EISA CMOS not writable Have the computer serviced. 02F5: DMA test failed Have the computer serviced. 02F6: Software NMI failed Have the computer serviced. 02F7: Fail-safe timer NMI Have the computer serviced. failed 12 ThinkPad® A21e Service and Troubleshooting Guide

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Message
Cause and action
0220: Monitor type error
The monitor type does not match the type specified in CMOS. Run the IBM
BIOS Setup Utility to make sure that your monitor type matches the type
specified in the utility.
0230: Shadow RAM error
The shadow RAM failed. Test your computer
’
s memory with PC-Doctor. If
you added a memory module just before turning the computer on, reinstall
it. Then test the memory with PC-Doctor.
0231: System RAM error
The system RAM failed. Test your computer
’
s memory with PC-Doctor. If
you added a memory module just before turning the computer on, reinstall
it. Then test the memory with PC-Doctor.
0232: Extended RAM
error
The extended RAM failed. Test your computer
’
s memory with PC-Doctor. If
you increased memory just before turning the computer on, reinstall it. Then
test the memory with PC-Doctor.
0250: System battery
error
The system battery is dead. Replace the battery and run the IBM BIOS Setup
Utility to verify the configuration. If you still have a problem, have the
computer serviced.
0251: System CMOS
checksum bad
The system CMOS may have been corrupted by an application program.
The computer uses the default settings. Run the BIOS Setup Utility to
reconfigure the settings. If you still see the same error code, have the
computer serviced.
0252: Password
checksum bad
The password you have set has been cleared. Run the BIOS Setup Utility to
set the password.
0260: System timer error
Have the computer serviced.
0270: Real time clock
error
Have the computer serviced.
0271: Date and time error
Neither the date nor the time is set in the computer. Set the date and time,
using the IBM BIOS Setup Utility.
0280: Previous boot
incomplete
Your computer was previously unable to complete the boot process. Turn
the computer off; then turn it on to start the IBM BIOS Setup Utility. Verify
the configuration and then restart the computer either by choosing the
Exit
Saving Changes
option under the
Restart
item or by pressing F10. If you
still see the same error code, have the computer serviced.
02D0: System cache error
The cache is disabled. Have the computer serviced.
02F4: EISA CMOS not
writable
Have the computer serviced.
02F5: DMA test failed
Have the computer serviced.
02F6: Software NMI
failed
Have the computer serviced.
02F7: Fail-safe timer NMI
failed
Have the computer serviced.
Solving computer problems
12
ThinkPad
®
A21e Service and Troubleshooting Guide