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Error messages
Table 2. Error messages
Symptom or error (beeps, if any)
FRU or action, in sequence
Fan error. 1. Fan.
2. Thermal grease.
3. System board.
Thermal sensing error.
The thermal sensor is not functioning correctly. Have the
computer serviced.
This system does not support batteries that are not
genuine Lenovo-made or authorized. The system will
continue to boot, but may not charge unauthorized
batteries.
Attention: Lenovo has no responsibility for the
performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out
of their use.
Replace the battery with the correct Lenovo battery for
this system.
No-beep symptoms
Table 3. No-beep symptoms
Symptom or error
FRU or action, in sequence
No beep, power-on indicator on, LCD blank, and no
POST.
1. Ensure that every connector is connected tightly
and correctly.
2. Memory module.
3. System board.
No beep, power-on indicator on, and LCD blank during
POST.
1. Reseat the Memory module.
2. System board.
The power-on password prompt appears. A power-on password or a supervisor password is set.
Type the password and press Enter.
The hard-disk password prompt appears. A hard-disk password is set. Type the password and
press Enter.
Beep symptoms
Table 4. Beep symptoms
Problem
Solution
One short beep, pause, three short beeps, pause, three
more short beeps, and one short beep
Ensure that memory modules are installed correctly. If
they are, and you still hear the beeps, have the computer
serviced.
Four cycles of four short beeps
The Security Chip has a problem. Have the computer
serviced.
Five short beeps, pause, ve short beeps, and pause
Continue to boot immediately when the error was
detected.
LCD-related symptoms
Important: The TFT LCD for the notebook computer contains many thin-lm transistors (TFTs). The
presence of a small number of dots that are missing, discolored, or always lighted is characteristic of TFT
LCD technology, but excessive pixel problems can cause viewing concerns.
Chapter 4. Related service information 37