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Beep symptoms
No beep symptoms
Symptom or error
FRU or action, in
sequence
One beep and a blank,
unreadable, or flashing LCD
1.
Reseat the LCD con-
nector.
2. LCD assembly.
3. System board.
One long and two short
beeps, and a blank or
unreadable LCD
1.
System board.
2. LCD assembly.
Two short beeps with error
codes
POST error. See “Numeric
error codes” on page 38
Two short beeps with blank
screen
1.
System board.
Only cursor appears
1.
Reinstall operating
system.
Symptom or error
FRU or action, in
sequence
No beep, power-on indicator
on, LCD blank, and no
POST
1.
Make sure that every
connector is con-
nected tightly and
correctly.
2. DIMM.
3. System board.
No beep, power-on indicator
on, and LCD blank during
POST
1.
Reseat DIMM.
2. System board.
No beep during POST, but
system runs correctly
1.
Speaker.
The power-on password
prompt
A power-on password or a
supervisor password is set.
Type the password and
press
Enter
.
The hard disk password
prompt
A hard disk password is set.
Type the password and
press
Enter
.
The DOS-full screen looks
smaller.
Start the ThinkPad Config-
uration program and set the
Screen expansion
function.
LCD-related symptoms
Important
The TFT LCD for the notebook computer contains many
thin-film transistors (TFTs). A small number of dots that are
missing, discolored, or always lighted is characteristic of
TFT LCD technology, but excessive pixel problems can
cause viewing concerns. The LCD should be replaced if
ThinkPad
X21
41
Summary of Contents for ThinkPad X21 2660
Page 1: ...IBM Mobile Systems ThinkPad X21 2660 2661 2662 Hardware Maintenance Manual February 2001 ...
Page 2: ...i ...
Page 23: ...18 ThinkPad X21 ...
Page 60: ...1070 Mini PCI adapter Battery pack 1010 Keyboard assembly 1050 6 ThinkPad X21 55 ...
Page 62: ...1090 LCD assembly Battery pack 1010 Keyboard assembly 1050 1 ThinkP ad 2 ThinkPad X21 57 ...
Page 71: ...Step Screw quantity Torque 1 M2 3 5mm 2 BK 19 6 Ncm 2 kgfcm 66 ThinkPad X21 ...
Page 73: ...1 Step Screw quantity Torque 1 M2 3 5mm 2 BK 19 6 Ncm 2 kgfcm 68 ThinkPad X21 ...
Page 85: ...80 ThinkPad X21 ...
Page 87: ...IBM Part Number 19K6850 Printed in U S A S1ðL 9626 ðð ...