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Table 3. Error messages (continued)
Symptom or error
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
Five short beeps, pause, and five more short beeps
One short beep, pause, three short beeps, pause, three
more short beeps, pause, and one short beep
Three short beeps, pause, one short beep, pause, one
more short beep, pause, and three short beeps
Five short beeps
One long and two short beeps
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
LCD technology, but excessive pixel problems can cause viewing concerns. If the LCD you are servicing has
two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more
visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.
Notes:
• This policy applies to all ThinkPad notebook computers purchased on 1 January, 2008 or later.
• Lenovo will not provide replacement if the LCD is within specification as we cannot guarantee that any
replacement LCD will have zero pixel defects.
• One pixel consists of R, G, B sub-pixels.
36
Hardware Maintenance Manual
FRU or action, in sequence
FRU or action, in sequence
System board
System board
1. Memory module
2. System board
Remove the installed PCI devices.
System board
System board
FRU or action, in sequence
1. Ensure that every connector is connected tightly
and correctly.
2. Memory module
3. System board
1. Reseat the memory module(s).
2. 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.
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