36
IdeaPad Y450 Hardware Maintenance Manual
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 30.
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).
Thermal sensing error.
System board.
Five short beeps and a blank screen.
System board.
One long and two short beeps.
Video configuration fails.
(no card installed or faulty).
An external ROM module does not
properly checksum to zero.
One long beep and a series of short
beeps.
Audible errors.
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
.