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Beep symptoms
Table 3. Beep symptoms
Symptom or error FRU or action, in sequence
One beep and a blank, unreadable, or
flashing LCD.
1. Reseat the LCD connector.
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 error codes” on
page 39.
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 the cursor appears. Reinstall the operating system.
Four cycles of four short beeps and a blank
screen.
System board (security chip)
Five short beeps and a blank screen. System board
No-beep symptoms
Table 4. No-beep symptoms
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
connected 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.
The power-on password prompt appears. A power-on password or a supervisor
password is set. Type the password and
press Enter.
The hard-disk password prompt appears. A hard-disk password is set. Type the
password and press Enter.
44 ThinkPad X301 Hardware Maintenance Manual