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Symptom/Error FRU/Action in Sequence
No beep during
POST but system
runs correctly.
Adjust the audio volume
control.
Speaker connector
System board
Note: The buzzer is on the
System board.
Keyboard/TrackPoint-Related
Symptoms
Symptom/Error FRU/Action in Sequence
Keyboard (one or
more keys) doesn't
work.
Go to “Keyboard and External
Input Device Check” on
page 28.
Reconnect keyboard cables.
Keyboard
System board
TrackPoint does not
work.
Go to “TrackPoint IV Check”
on page 29.
Reconnect keyboard cables.
TrackPoint board
Keyboard
System board
LCD-Related Symptoms
LCD FRU Replacement Notice
The TFT LCD for the notebook computer contains
over 2,359,296 thin-film transistors (TFTs). A small
number of missing, discolored, or lighted dots (on all
the time) is characteristic of TFT LCD technology, but
excessive pixel problems can cause viewing concerns.
The LCD should be replaced if the number of missing,
discolored, or lighted dots in any background is:
SVGA (12.1"): 5 or more bright dots, 5 or more
dark dots, or a total of 9 or more bright and dark
dots
XGA (13.3"): 8 or more bright dots, 8 or more
dark dots, or a total of 9 or more bright and dark
dots
40 ThinkPad i Series 1400 HMM