Error messages
Symptom or error
FRU or action, in sequence
Device address conflict.
1. Load “Setup Defaults” in
IBM BIOS Setup Utility.
2. Backup battery.
3. System board.
Allocation error for device.
1. Load “Setup Defaults” in
IBM BIOS Setup Utility.
2. Backup battery.
3. System board.
Failing bits: nnnn.
1. DIMM.
2. System board.
Invalid system configuration
data.
1. DIMM.
2. System board.
I/O device IRQ conflict.
1. Load “Setup Defaults” in
IBM BIOS Setup Utility.
2. Backup battery.
3. System board.
Operating system not found.
1. Check that the operating
system has no failure and is
installed correctly.
2. Enter IBM BIOS Setup
Utility and see whether
the hard-disk drive and
the diskette drive are
properly identified.
3. Reseat the hard-disk drive.
4. Reinstall the operating
system.
5. Diskette drive.
6. Hard-disk drive.
7. System board.
Hibernation error.
1. Restore the system
configuration to what it
was before the computer
entered hibernation mode.
2. If memory size has been
changed, re-create the
hibernation file.
Fan error.
Fan.
Thermal sensing error.
System board.
Symptom-to-FRU index
52
ThinkPad T20, T21, T22, T23 (MT 2647/2648)
Summary of Contents for ThinkPad T21
Page 4: ...iv ThinkPad T20 T21 T22 T23 MT 2647 2648...
Page 44: ...Checkout guide 38 ThinkPad T20 T21 T22 T23 MT 2647 2648...
Page 83: ...9 8 7 7 8 9 10 9 continued Removing and replacing a FRU ThinkPad T20 T21 T22 and T23 series 77...
Page 132: ...6 5 4 7 5 3 continued Removing and replacing a FRU 126 ThinkPad T20 T21 T22 T23 MT 2647 2648...
Page 181: ...Notices ThinkPad T20 T21 T22 and T23 series 175...
Page 182: ...Part Number 62P9631 1P P N 62P9631...