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Event
Low battery
warning beep
Critical
Thermal
DRAM type
error
Responses of
Boot Block
BIOS Flash
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.
46
ThinkPad R30/R31 HMM
Description
System POST
PC133 SDRAM
only
Success
BIOS file size
mismatch
BIOS file
reading error
Floppy drive not
installed
Inhibit bay swap Yes
System enters /
resume from
S1/S3/S4 state.
Volume key
Up/Down
S1/S3 Beep
N/A
4 short beeps
N/A
3 long beeps
N/A
2 long beeps
N/A
2 long, 1 short, and
then 1 long beep
N/A
1 long, 1 short beep
N/A
1 long, 2 short beeps
N/A
2 short beeps
Continuous 2 short, 1
long beeps .
NO
1 short beep
N/A
1 short beep
N/A
1 short beep

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