IBM THINKPAD L460, Hardware Maintenance Manual

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Table 3. Error messages (continued)
Symptom or error FRU or action, in sequence
The battery installed is not supported by this system
and will not charge. Please replace the battery with the
correct Lenovo battery for this system. Press the ESC
key to continue. Replace the battery pack .
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. Press the ESC key to continue.
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 pack .
Beep symptoms
Table 4. Beep symptoms
Symptom or error FRU or action, in sequence
Four cycles of four short beeps Replace the system board.
One short beep, pause, three short beeps, pause, three
more short beeps, pause, and one short beep (1–3–3–1
beeps)
1. Replace the memory module .
2. Replace the system board.
Five short beeps Replace the system board.
One long and two short beeps Replace the system board.
Three short beeps, pause, one short beep, pause, one
more short beep, pause, and three short beeps (3–1–1–3
beeps) Have the computer serviced.
Five short beeps, pause, five more short beeps, and
pause Replace the system board.
No-beep symptoms
Table 5. 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. Reseat memory module.
3. Replace the system board.
No beep, power-on indicator on, and LCD blank during
POST.
1. Reseat memory module .
2. Replace the 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 .
LCD-related symptoms
Important: The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). The
presence of a small number of dots that are missing, discolored, or always lighted is characteristic of TFT
Chapter 4
.
Related service information
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