Beep Symptoms; No-Beep Symptoms; Lcd-Related Symptoms - IBM THINKPAD L460 Hardware Maintenance Manual

Table 3. Error messages (continued)
Symptom or error
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.
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.

Beep symptoms

Table 4. Beep symptoms
Symptom or error
Four cycles of four short beeps
One short beep, pause, three short beeps, pause, three
more short beeps, pause, and one short beep (1–3–3–1
beeps)
Five short beeps
One long and two short beeps
Three short beeps, pause, one short beep, pause, one
more short beep, pause, and three short beeps (3–1–1–3
beeps)
Five short beeps, pause, five more short beeps, and
pause

No-beep symptoms

Table 5. No-beep symptoms
Symptom or error
No beep, power-on indicator on, LCD blank, and no
POST.
No beep, power-on indicator on, and LCD blank during
POST.
The power-on password prompt appears.
The hard disk password prompt appears.

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
FRU or action, in sequence
Replace the battery pack.
Replace the battery pack.
FRU or action, in sequence
Replace the system board.
1. Replace the memory module.
2. Replace the system board.
Replace the system board.
Replace the system board.
Have the computer serviced.
Replace the system board.
FRU or action, in sequence
1. Ensure that every connector is connected tightly
and correctly.
2. Reseat memory module.
3. Replace the system board.
1. Reseat memory module.
2. Replace the system board.
A power-on password or a supervisor password is set.
Type the password and press Enter.
A hard disk password is set. Type the password and
press Enter.
Chapter 4
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Related service information
37