No Beep Symptoms
Symptom/Error FRU/Action in Sequence
No beep, power-on
indicator on, LCD
blank, no POST
Ensure every connector is
connected tightly and cor-
rectly.
DIMM
System board
No beep, power-on
indicator off, LCD
blank during POST
Battery ASM
AC Adapter
System board
No beep, power-on
indicator on, LCD
blank during POST
Reseat DIMM.
System board
No beep during
POST but system
runs correctly.
Speaker
LCD-Related Symptoms
Symptom/Error FRU/Action in Sequence
LCD backlight not
working
LCD too dark
LCD brightness
cannot be adjusted
LCD contrast cannot
be adjusted
1. Reseat the LCD connector.
2. LCD FPC ASM
3. LCD inverter
4. LCD
5. System board
LCD screen unread-
able
Character missing
pels
Screen abnormal
Wrong color dis-
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.
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.
1. Reseat the keyboard cable.
2. Keyboard
3. System board
Indicator-Related Symptoms

ThinkPad 240 19