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
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
Symptom/Error
FRU/Action in Sequence
Indicator incorrectly
remains off or on, but
system runs cor-
rectly.
1. Reseat the LED cable.
2. LED cable
3. System board
36
ThinkPad 240X
Summary of Contents for ThinkPad 240X
Page 1: ...S19K 5649 00 IBM Mobile Systems ThinkPad 240X 2609 Hardware Maintenance Manual May 2000 ...
Page 4: ...iv ThinkPad 240X ...
Page 24: ...18 ThinkPad 240X ...
Page 79: ...Description FRU Number Power cord Argentina 2 PIN 36L8870 General Description 73 ...
Page 84: ...IBM Part Number 19K5649 Printed in U S A S19K 5649 ðð ...