Laptop L40SX - Symptom-TO-FRU-Index

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Service Hints & Tips

Document ID: GSMH-3C7DB2

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Laptop L40SX - Symptom-TO-FRU-Index

Applicable to: World-Wide

Symptom-to-FRU Index:
The Symptom-to-FRU Index lists symptoms and errors and the possible causes. The most likely cause is listed first.

If the computer displays an error message, first replace FRUs listed in the error message. An X in an error message can be any number.

Note:
If you have an IBM device with its own service manual or a device not supported by the advanced diagnostics tests, refer to the manual for that device.

Symptom/Error

FRU/Action

One or more keys do not work.
(See -'External Keyboard/Auxillary Input Device Checkout' -- before replacing any FRUs.)

1. Keyboard
2. System Board

No beep and a blank or unreadable display during POST.
(See ¿Power Systems Checkout— on page 4 before replacing any FRUs.)

1. System Board
2. Any options or devices
3. Power source when failing
4. Speaker

No beep with a normal display during POST.

1. Speaker
2. System Board

Continuous beep

1. System Board
2. Any options or devices

Repeating short beeps.
(See -- 'External keyboard/Auxillary Input Device checkout' -- before replacing any FRUs.)

1. System Board
2. Keyboard

Dew Point or Temperature icon appears with one long and one short beep.

1. System Board
2. Power source when failing

One long and one short beep.

1. System Board
2. Power source when failing

One long and two short beeps.

1. System Board
2. Power source when failing

One short beep and a blank, unreadable, or flashing display with no external display attached.

1. Display (LCD)
2. System Board
3. Power source when failing

One short beep and Diskette Prompt or a program load from the hard disk drive or unable to read diskette(s).

1. Diskette Drive
2. System Board
3. Diskette Drive Cable

Two short beeps and a blank display.

1. System Board
2. Any options or devices

External display problems.
(See -- 'External display self-test' -- before replacing any FRUs.)

1. External Display
2. System Board

Incorrect memory size during POST. (See ¿Memory Checkout— before replacing any FRUs.)

1. System Board
2. Memory Module Kits

Computer hang-up or intermittent hang-up.

1. System Board
2. Hard Disk Drive
3. Math Coprocessor
4. Replace the last device being tested
(See ¿Undetermined Problem—)

Computer does not suspend or resume.
(Check the Suspend icon to make sure of the failure.)

1. System Board
2. System-Status Display Assembly
3. Any options or devices

Computer does not power off.

1. System-Status Display Assembly
2. System Board

Real-time clock inaccurate.

1. System Board

Printer problems.

1. See -- 'Printer Checkout' --.

Serial or parallel port device problems.

1. Device
2. Cable
3. System Board

ICON is incorrectly blinking or stays on.

1. System Board
2. Related Device

ICON incorrectly remains off, but diagnostics runs without an error.

1. System Board
2. Related Device
3. System-Status Display Assembly

Internal Data/Fax Modem does not communicate with a remote modem or a fax. (See -- 'Fax/Modem checkout' -- before replacing any FRUs.)

1. Internal Data/Fax Modem
(Make sure Data/Fax Modem power option is set to on in the Set Features program.)

101, 103, 107, 111

1. System Board
2. Hard Disk Drive
3. Diskette Drive
4. Any attached devices

109, 110, 121

1. Memory Module Kits
(See ¿Memory Checkout— before replacing any FRUs.)
2. System Board

122, 124

1. System Board
2. Auxiliary Input Device
3. Keyboard

123

1. Hard Disk Drive
2. System Board
3. Hard Disk Drive Cable

141

1. System-Status Display Assembly
2. System Board

149

1. System Board
2. Hard Disk Drive
3. Hard Disk Drive Cable

161

1. Run Automatic Configuration
2. Backup Battery
3. System Board

162

1. Run Automatic Configuration, then check the installed devices using the View configuration utility.
2. System Board
3. Diskette Drive
4. Hard Disk Drive
5. Math Coprocessor
6. Diskette Drive Cable
7. Hard Disk Drive Cable

163

1. Time and Date Set?
2. System Board

164
(See ¿Memory Checkout—before replacing any FRUs.)

1. Run Automatic Configuration
2. Memory Module Kits
3. System Board

199

1. See ¿Checking Installed Devices—.

1XX
(not listed above)

1. System Board

211
(on POST)

1. System Board
2. Memory Module Kits

221
(on POST)

1. System Board

204, 214, 224, 240

1. System Board
2. Memory Module Kits

25X

1. System Board

2XX
(not listed above)
(See ¿Memory Checkout— before replacing any FRUs.)

1. Memory Module Kits
2. System Board

301, 302

1. System Board
2. Keyboard

303

1. System Board
2. Numeric Keypad
3. Keyboard

304, 305 (See -- 'Extenal keyboard/Auxillary Input Device Checkout' -- before replacing any FRUs.)

1. Keyboard
2. System Board
3. Numeric Keypad

306, 310

1. System Board

308

1. Numeric Keypad

3XX
(not listed above)
(See -- 'External keyboard/Auxillary Input Device Checkout' -- before replacing any FRUs. )

1. System Board
2. Auxiliary input device
3. Keyboard

602, 653, 654

1. Defective diskette
2. Diskette Drive
3. System Board

655, 660, 661

1. System Board

6XX
(not listed above)

1. Diskette Drive
2. System Board
3. Diskette Drive Cable

7XX

1. Math Coprocessor
2. System Board
(IBM does not supply a math coprocessor)

9XX

1. System Board
2. Any parallel Device
3. Communication Cable

1107

1. Communication Cable

11XX

1. System Board
2. Any serial adapter
3. Communication Cable

1207

1. Communication Cable

12XX

1. Any serial adapter
2. System Board
3. Any serial device
4. Communication Cable

1705 to 1707, 1709, 1711,
1718 to 1720, 1730, 1732

1. Hard Disk Drive
(Reformatting the hard disk can recover from the problem.)

17XX
(not listed above)

1. Hard Disk Drive
2. System Board
3. Hard Disk Drive Cable

24XX

1. System Board

5001 to 5016

1. System Board

5017 to 502X

1. System Board
2. LCD Display Assembly

503X

1. External CRT Display
2. System Board

8601, 8602

1. Pointing Device
2. System Board
3. Numeric Keypad

8604

1. System Board

86XX
(not listed above)

1. System Board
2. Pointing Device
3. Numeric Keypad

101XX
(See -- 'Fax/Modem checkout' -- before replacing any FRUs.)

1. Internal Data/Fax Modem
2. System Board
3. Any serial device

102XX

1. System-Status Display Assembly
2. System Board
3. Related device

Search Keywords

Hint Category

Hardware Maintenance Information

Date Created

09-12-96

Last Updated

15-04-98

Revision Date

02-04-99

Brand

IBM ThinkPad

Product Family

Laptop L40

Machine Type

8543

Model

Various

TypeModel

Retain Tip (if applicable)

N/A

Reverse Doclinks
and Admin Purposes

Symptom/Error	FRU/Action
One or more keys do not work. (See -'External Keyboard/Auxillary Input Device Checkout' -- before replacing any FRUs.)	1. Keyboard 2. System Board
No beep and a blank or unreadable display during POST. (See ¿Power Systems Checkout— on page 4 before replacing any FRUs.)	1. System Board 2. Any options or devices 3. Power source when failing 4. Speaker
No beep with a normal display during POST.	1. Speaker 2. System Board
Continuous beep	1. System Board 2. Any options or devices
Repeating short beeps. (See -- 'External keyboard/Auxillary Input Device checkout' -- before replacing any FRUs.)	1. System Board 2. Keyboard
Dew Point or Temperature icon appears with one long and one short beep.	1. System Board 2. Power source when failing
One long and one short beep.	1. System Board 2. Power source when failing
One long and two short beeps.	1. System Board 2. Power source when failing
One short beep and a blank, unreadable, or flashing display with no external display attached.	1. Display (LCD) 2. System Board 3. Power source when failing
One short beep and Diskette Prompt or a program load from the hard disk drive or unable to read diskette(s).	1. Diskette Drive 2. System Board 3. Diskette Drive Cable
Two short beeps and a blank display.	1. System Board 2. Any options or devices
External display problems. (See -- 'External display self-test' -- before replacing any FRUs.)	1. External Display 2. System Board
Incorrect memory size during POST. (See ¿Memory Checkout— before replacing any FRUs.)	1. System Board 2. Memory Module Kits
Computer hang-up or intermittent hang-up.	1. System Board 2. Hard Disk Drive 3. Math Coprocessor 4. Replace the last device being tested (See ¿Undetermined Problem—)
Computer does not suspend or resume. (Check the Suspend icon to make sure of the failure.)	1. System Board 2. System-Status Display Assembly 3. Any options or devices
Computer does not power off.	1. System-Status Display Assembly 2. System Board
Real-time clock inaccurate.	1. System Board
Printer problems.	1. See -- 'Printer Checkout' --.
Serial or parallel port device problems.	1. Device 2. Cable 3. System Board
ICON is incorrectly blinking or stays on.	1. System Board 2. Related Device
ICON incorrectly remains off, but diagnostics runs without an error.	1. System Board 2. Related Device 3. System-Status Display Assembly
Internal Data/Fax Modem does not communicate with a remote modem or a fax. (See -- 'Fax/Modem checkout' -- before replacing any FRUs.)	1. Internal Data/Fax Modem (Make sure Data/Fax Modem power option is set to on in the Set Features program.)
101, 103, 107, 111	1. System Board 2. Hard Disk Drive 3. Diskette Drive 4. Any attached devices
109, 110, 121	1. Memory Module Kits (See ¿Memory Checkout— before replacing any FRUs.) 2. System Board
122, 124	1. System Board 2. Auxiliary Input Device 3. Keyboard
123	1. Hard Disk Drive 2. System Board 3. Hard Disk Drive Cable
141	1. System-Status Display Assembly 2. System Board
149	1. System Board 2. Hard Disk Drive 3. Hard Disk Drive Cable
161	1. Run Automatic Configuration 2. Backup Battery 3. System Board
162	1. Run Automatic Configuration, then check the installed devices using the View configuration utility. 2. System Board 3. Diskette Drive 4. Hard Disk Drive 5. Math Coprocessor 6. Diskette Drive Cable 7. Hard Disk Drive Cable
163	1. Time and Date Set? 2. System Board
164 (See ¿Memory Checkout—before replacing any FRUs.)	1. Run Automatic Configuration 2. Memory Module Kits 3. System Board
199	1. See ¿Checking Installed Devices—.
1XX (not listed above)	1. System Board
211 (on POST)	1. System Board 2. Memory Module Kits
221 (on POST)	1. System Board
204, 214, 224, 240	1. System Board 2. Memory Module Kits
25X	1. System Board
2XX (not listed above) (See ¿Memory Checkout— before replacing any FRUs.)	1. Memory Module Kits 2. System Board
301, 302	1. System Board 2. Keyboard
303	1. System Board 2. Numeric Keypad 3. Keyboard
304, 305 (See -- 'Extenal keyboard/Auxillary Input Device Checkout' -- before replacing any FRUs.)	1. Keyboard 2. System Board 3. Numeric Keypad
306, 310	1. System Board
308	1. Numeric Keypad
3XX (not listed above) (See -- 'External keyboard/Auxillary Input Device Checkout' -- before replacing any FRUs. )	1. System Board 2. Auxiliary input device 3. Keyboard
602, 653, 654	1. Defective diskette 2. Diskette Drive 3. System Board
655, 660, 661	1. System Board
6XX (not listed above)	1. Diskette Drive 2. System Board 3. Diskette Drive Cable
7XX	1. Math Coprocessor 2. System Board (IBM does not supply a math coprocessor)
9XX	1. System Board 2. Any parallel Device 3. Communication Cable
1107	1. Communication Cable
11XX	1. System Board 2. Any serial adapter 3. Communication Cable
1207	1. Communication Cable
12XX	1. Any serial adapter 2. System Board 3. Any serial device 4. Communication Cable
1705 to 1707, 1709, 1711, 1718 to 1720, 1730, 1732	1. Hard Disk Drive (Reformatting the hard disk can recover from the problem.)
17XX (not listed above)	1. Hard Disk Drive 2. System Board 3. Hard Disk Drive Cable
24XX	1. System Board
5001 to 5016	1. System Board
5017 to 502X	1. System Board 2. LCD Display Assembly
503X	1. External CRT Display 2. System Board
8601, 8602	1. Pointing Device 2. System Board 3. Numeric Keypad
8604	1. System Board
86XX (not listed above)	1. System Board 2. Pointing Device 3. Numeric Keypad
101XX (See -- 'Fax/Modem checkout' -- before replacing any FRUs.)	1. Internal Data/Fax Modem 2. System Board 3. Any serial device
102XX	1. System-Status Display Assembly 2. System Board 3. Related device

	Search Keywords
	Hint Category	Hardware Maintenance Information
	Date Created	09-12-96
	Last Updated	15-04-98
	Revision Date	02-04-99
	Brand	IBM ThinkPad
	Product Family	Laptop L40
	Machine Type	8543
	Model	Various
	TypeModel
	Retain Tip (if applicable)	N/A
	Reverse Doclinks and Admin Purposes