Lcd-Related Symptoms - IBM ThinkPad R30 Hardware Maintenance Manual

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:
v XGA : 8 or more bright dots, 8 or more dark dots,
or a total of 9 or more bright and dark dots.
Symptom/Error
LCD backlight does not
work.
LCD is too dark.
LCD brightness cannot
be adjusted.
Unreadable LCD screen.
Missing pixels in
characters.
Abnormal screen
Wrong color displayed.
LCD has extra horizontal
or vertical lines
displayed.
44
ThinkPad R30/R31 HMM
FRU/Action in Sequence
v Keyboard (if contrast and
brightness function keys do not
work)
v Reseat LCD connector
v Check LCD inverter ID
v LCD Cable ASM
v LCD Inverter/LED board
(13.3"/14.1")
v LCD
v System board
v Reseat LCD connector
v Check LCD inverter ID
v LCD Cable ASM
v LCD Inverter/LED board
(13.3"/14.1")
v LCD
v System board
v Check LCD inverter ID
v LCD Cable ASM
v LCD Inverter/LED board
(13.3"/14.1")
v LCD
v System board