IBM T23 Hardware Maintenance Manual - Page 59

Beep symptoms, No-beep symptoms - bios password

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Beep symptoms Symptom-to-FRU index 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 49. Two short beeps and a blank screen. 1. System board. 2. DIMM. Two or more beeps, or a continuous beep. Operating system starts successfully. If a mini-PCI Ethernet card is installed, confirm that Alert On LAN 2 in IBM BIOS Setup Utility is disabled. 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. 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 A hard-disk password is set. appears. Type the password and press Enter. The DOS full screen looks smaller. Start the ThinkPad Configuration program and set the Screen expansion function. ThinkPad T20, T21, T22 and T23 series 53

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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 49.
Two short beeps and a blank
screen.
1.
System board
.
2.
DIMM.
Two or more beeps, or a
continuous beep. Operating
system starts successfully.
If a mini-PCI Ethernet card is
installed, confirm that
Alert On
LAN 2
in IBM BIOS Setup
Utility is
disabled
.
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
.
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
.
The DOS full screen looks
smaller.
Start the ThinkPad
Configuration program and set
the
Screen expansion
function.
Symptom-to-FRU index
ThinkPad T20, T21, T22 and T23 series
53