LCD-Related Symptoms
LCD FRU Replacement Notice
The TFT LCD for the computer contains many
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:
vXGA : 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
LCD backlight does not
work.
LCD is too dark.
LCD brightness cannot
be adjusted.
vKeyboard (if contrast and
brightness function keys do not
work)
vReseat LCD connector
vCheck LCD inverter ID
vLCD Cable ASM
vLCD Inverter/LED board
(13.3″/14.1″)
vLCD
vSystem board
Unreadable LCD screen.
Missing pixels in
characters.
Abnormal screen
Wrong color displayed.
vReseat LCD connector
vCheck LCD inverter ID
vLCD Cable ASM
vLCD Inverter/LED board
(13.3″/14.1″)
vLCD
vSystem board
LCD has extra horizontal
or vertical lines
displayed.
vCheck LCD inverter ID
vLCD Cable ASM
vLCD Inverter/LED board
(13.3″/14.1″)
vLCD
vSystem board
44 ThinkPad R30/R31 HMM