Lcd-Related Symptoms - IBM ThinkPad R30 Hardware Maintenance Manual

Run Time /
Sleep state
BaySwap
alarm
AC
attach/detach
Power Control
Beep
Volume control
beep

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.
Inhibit bay swap Yes
System enters /
resume from
S1/S3/S4 state.
Volume key
Up/Down
FRU/Action in Sequence
v Keyboard (if contrast and
v Reseat LCD connector
v Check LCD inverter ID
v LCD Cable ASM
v LCD Inverter/LED board
v LCD
v System board
v Reseat LCD connector
v Check LCD inverter ID
v LCD Cable ASM
v LCD Inverter/LED board
v LCD
v System board
Continuous 2 short, 1
long beeps .
NO 1 short beep
N/A 1 short beep
N/A 1 short beep
brightness function keys do not
work)
(13.3"/14.1")
(13.3"/14.1")
ThinkPad R30 and R31
47