IBM 240 사용자 설명서
No Beep Symptoms
Symptom/Error
FRU/Action in Sequence
No beep, power-on
indicator on, LCD
blank, no POST
indicator on, LCD
blank, no POST
Ensure every connector is
connected tightly and cor-
rectly.
connected tightly and cor-
rectly.
DIMM
System board
No beep, power-on
indicator off, LCD
blank during POST
indicator off, LCD
blank during POST
Battery ASM
AC Adapter
System board
No beep, power-on
indicator on, LCD
blank during POST
indicator on, LCD
blank during POST
Reseat DIMM.
System board
No beep during
POST but system
runs correctly.
POST but system
runs correctly.
Speaker
LCD-Related Symptoms
Symptom/Error
FRU/Action in Sequence
LCD backlight not
working
working
LCD too dark
LCD brightness
cannot be adjusted
cannot be adjusted
LCD contrast cannot
be adjusted
be adjusted
1. Reseat the LCD connector.
2. LCD FPC ASM
3. LCD inverter
4. LCD
5. System board
LCD screen unread-
able
able
Character missing
pels
pels
Screen abnormal
Wrong color dis-
played
played
1. Reseat the LCD connector.
2. LCD FPC ASM
3. LCD inverter
4. LCD
5. System board
LCD has extra hori-
zontal or vertical lines
displayed.
zontal or vertical lines
displayed.
1. LCD FPC ASM
2. LCD inverter
3. LCD
4. System board
Keyboard-Related Symptoms
Symptom/Error
FRU/Action in Sequence
Keyboard (one or
more keys) doesn't
work.
more keys) doesn't
work.
1. Reseat the keyboard cable.
2. Keyboard
3. System board
Indicator-Related Symptoms
ThinkPad 240
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