Symptom-to-FRU index

Beep symptoms

 

 

 

 

Symptom or error

FRU or action, in sequence

 

 

 

One beep and a blank,

1.

Reseat the LCD

unreadable, or flashing LCD.

 

connector.

 

2.

LCD assembly.

 

3.

External CRT.

 

4.

System board.

 

 

 

One long and two short beeps,

1.

System board.

and a blank or unreadable

2.

LCD assembly.

LCD.

3.

DIMM.

 

 

 

Two short beeps with error

POST error. See “Numeric

codes.

error codes” on page 49.

 

 

 

Two short beeps and a blank

1.

System board.

screen.

2.

DIMM.

 

 

Two or more beeps, or a

If a mini-PCI Ethernet card is

continuous beep. Operating

installed, confirm that Alert On

system starts successfully.

LAN 2 in IBM BIOS Setup

 

Utility is disabled.

 

 

 

Three short beeps, pause,

1.

DIMM.

three more short beeps, and

2.

System board

one short beep.

 

 

 

 

 

One short beep, pause, three

 

 

short beeps, pause, three more

 

 

short beeps, and one short

 

 

beep.

 

 

 

 

Only cursor appears.

Reinstall operating system.

 

 

 

No-beep symptoms

 

 

 

 

Symptom or error

FRU or action, in sequence

 

 

 

No beep, power-on indicator

1.

Make sure that every

on, LCD blank, and no POST.

 

connector is connected

 

 

tightly and correctly.

 

2.

DIMM.

 

3.

System board.

 

 

 

No beep, power-on indicator

1.

Reseat DIMM.

on, and LCD blank during

2.

System board.

POST.

 

 

 

 

The power-on password prompt

A power-on password or a

appears.

supervisor password is set.

 

Type the password and press

 

Enter.

 

 

The hard-disk password prompt

A hard-disk password is set.

appears.

Type the password and press

 

Enter.

 

 

The DOS full screen looks

Start the ThinkPad

smaller.

Configuration program and set

 

the Screen expansion

 

function.

 

 

 

ThinkPad T20, T21, T22 and T23 series 53

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Image 59
IBM T21, T22 manual Beep symptoms