Symptom-to-FRU index
Beep symptoms
Symptom o r error FRU o r a ctio n, in sequence
One beep and a blank,
unreadable, or flashing LCD.
1. Reset the LCD con n ecto r.
2. LCD assembly.
3. External CRT.
4. System board.
One long and two short beeps,
and a blank or unreadable
LCD.
1. System board.
2. LCD assembly.
3. DIMM.
Two short beeps with error
codes.
POST error. See “ Numeric
erro r co des” on page 53.
Two short beeps and a blank
screen.
1. System board.
2. DIMM.
Three short beeps, pause,
three more short beeps, and
one short beep.
1. DIMM.
2. System board
One short beep, pause, three
short beeps, pause, three more
short beeps, and one short
beep.
Only cursor appears. Reinstall operating system .
Four cycles of four short beeps
and a blank screen.
System board (IBM security
chip)
Five short beeps and a blank
screen.
System board
No-beep symptoms
Symptom o r error FRU o r a ctio n, in sequence
No beep, power-on indicator
on, LCD blank, and no POST.
1. Make sure that every
connecto r is connected
tigh tly and c o rre ctly.
2. DIMM.
3. System board.
No beep, power-on indicator
on, and LCD blank during
POST.
1. Reset DIMM.
2. System board.
The power-on password prompt
appears.
A power-on password or a
supervisor password is set.
Type the password and press
E nter.
The hard-disk password prompt
appears.
A hard-disk password is set.
Type the password and press
E nter.
The DOS full screen looks
smaller.
Start the ThinkPad
Configuration program and set
the Screen expansion
function.
ThinkPad R40 57
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