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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 (14.1"): 8 or more bright dots, 8 or more
dark dots, or a total of 9 or more bright and dark
dots
Symptom/Error FRU/Action in Sequence
No beep, power-on
indicator turns on and
LCD is blank.
Power source (battery and
adapter). See “Power
Systems Check” on
page 111.
Reconnect the LCD connector
DC/DC charger
Hard disk drive
LCD inverter ID
LCD LVDS board (for
14.1–inch LCD)
LCD FPC cable
Inverter
LCD
System board
LCD backlight doesn't
work.
LCD is too dark.
LCD brightness
cannot be adjusted.
LCD contrast cannot
be adjusted.
Enter BIOS Utility and
execute "Load Setup Default
Settings"; then reboot the
system.
Reconnect the LCD connec-
tors
Keyboard (if contrast and
brightness function keys do
not work)
LCD inverter ID
LCD LVDS board (for
14.1–inch LCD)
LCD FPC cable
LCD inverter
LCD
System board
126 ThinkPad i Series 1400 HMM