Lenovo ThinkPad T21 English - 46L4325 - ThinkPad T20, T21User's Reference guid - Page 35

Hardware troubleshooting - ram

Get Lenovo ThinkPad T21 PDF manuals and user guides View all Lenovo ThinkPad T21 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 35 highlights

Hardware troubleshooting Message 021x: Keyboard error 0220: Monitor type error 0230: Shadow RAM error 0231: System RAM error 0232: Extended RAM error 0250: System battery error 0251: System CMOS checksum bad 0252: Password checksum bad 0260: System timer error Cause and action Make sure that no object is placed on the keyboard or on the external keyboard, if one is attached. Turn off the computer, and turn off all attached devices. Turn on the computer first; then turn on the attached devices. If you still see the same error code, do the following: Make sure that the right connector is being used between the external keyboard and the computer. Turn off the computer, disconnect the external keyboard, and turn the computer on again. If your built-in keyboard operates correctly, have the external keyboard serviced. Test the computer by using PC-Doctor (refer to "Testing your computer" on page 35). If the computer stops during the test, have it serviced. The monitor type does not match the type specified in CMOS. Run the IBM BIOS Setup Utility (refer to "Starting BIOS Setup Utility" on page 8) to make sure that your monitor type matches the type specified in the utility. The shadow RAM failed. Test your computer's memory with PC-Doctor (refer to "Testing your computer" on page 35). If you added a memory module just before turning the computer on, reinstall it. Then test the memory with PC-Doctor. The system RAM failed. Test your computer's memory with PC-Doctor (refer to "Testing your computer" on page 35). If you added a memory module just before turning the computer on, reinstall it. Then test the memory with PC-Doctor. The extended RAM failed. Test your computer's memory with PC-Doctor (refer to "Testing your computer" on page 35). If you added a memory module just before turning the computer on, reinstall it. Then test the memory with PC-Doctor. The system battery is dead. Replace the battery and run the BIOS Setup Utility (refer to "Starting BIOS Setup Utility" on page 8) to verify the configuration. If you still have a problem, have the computer serviced. The system CMOS may have been corrupted by an application program. Run the BIOS Setup Utility (refer to "Starting BIOS Setup Utility" on page 8) to reconfigure the settings. If the same error code appears, have the computer serviced. The password you have set has been cleared. Run the BIOS Setup Utility (refer to "Starting BIOS Setup Utility" on page 8) to set the password. Have the computer serviced. Chapter 3. Solving computer problems 19

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
Hardware troubleshooting
Message
Cause and action
021x: Keyboard error
Make sure that no object is placed on the keyboard or on the external
keyboard, if one is attached.
Turn off the computer, and turn off all
attached devices.
Turn on the computer first; then turn on the attached
devices.
If you still see the same error code, do the following:
±
Make sure that the right connector is being used between the external
keyboard and the computer.
±
Turn off the computer, disconnect the external keyboard, and turn the
computer on again.
If your built-in keyboard operates correctly, have
the external keyboard serviced.
Test the computer by using PC-Doctor (refer to “Testing your computer”
on page
35).
±
If the computer stops during the test, have it serviced.
0220: Monitor type error
The monitor type does not match the type specified in CMOS.
Run the
IBM BIOS Setup Utility (refer to “Starting BIOS Setup Utility” on page
8) 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
(refer to “Testing your computer” on page
35).
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
(refer to “Testing your computer” on page
35).
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
(refer to “Testing your computer” on page
35).
If you added a memory
module 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 BIOS Setup
Utility (refer to “Starting BIOS Setup Utility” on page
8) 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.
Run the BIOS Setup Utility (refer to “Starting BIOS Setup Utility” on
page
8) to reconfigure the settings.
If the same error code appears, have
the computer serviced.
0252: Password
checksum bad
The password you have set has been cleared. Run the BIOS Setup Utility
(refer to “Starting BIOS Setup Utility” on page
8) to set the password.
0260: System timer error
Have the computer serviced.
Chapter 3.
Solving computer problems
19