TP 700,720 - Miscellaneous Symptoms

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Service Hints & Tips

Document ID: GSMH-3BVFWB

TP 700,720 - Miscellaneous Symptoms

Applicable to: World-Wide

Miscellaneous Symptoms:

Symptom/Error

FRU/Action

Power-on password is not reactivated.

1. Check the power-on password switch position.

Problem occurs only when port replicator installed.

1. Port Replicator

No beep and a blank or unreadable display during POST.

1. See ¿Power Systems Checkout— on before replacing any FRUs.
2. Processor Card
3. System Board
4. Video Card
5. Hard Disk Drive
6. Base Memory Card
7. Any option or device
8. Power source in use when failure occurs
9. Voltage Converter
10. Speaker

No beep with a blinking cursor.

1. System Board
2. Processor Card
3. Any Option or Device

No beep with a normal display during POST.

1. Speaker
2. System Board
3. Keyboard Control Card
4. Voltage Converter

No beep and the system hangs with CP XX at the right-bottom corner of the screen.

1. System Board
2. Processor Card

No beep and the system hangs after displaying the memory count.

1. System Board
2. Processor Card
3. Hard Disk Drive
4. Coprocessor

No boot with blank screen.

1. System Board

Extra horizontal or vertical lines displayed on upper or lower half of the LCD.

1. LCD
2. Video Card
3. System Board

LCD screen unreadable or characters missing pels.

1. See important note for ¿LCD FRU Replacement Notice—.
2. LCD Assembly
3. System Board

LCD too dark, unable to adjust contrast or brightness.

1. LCD
2. Video Card

LCD slightly dims when changing to battery power.

1. Normal operation
(Dimming of LCD conserves battery power.)

LCD unreadable, illegible, or distorted.

1. LCD
2. Video Card
3. System Board

LCD cannot be powered-on or off.

1. Video Card
2. System Board
3. Voltage Converter

Blank screen, or extra horizontal or vertical lines displayed on upper or lower half of the LCD with no beep or one short beep.

1. LCD
2. Video Card
3. System Board

System status indicator is incorrectly blinking or stays on.

1. System Board
2. Related Device
3. Indicator Assembly

System status indicator stays off, but the POST ends without an error.

1. System Board
2. Related Device
3. Indicator Assembly

No keys on the keyboard work.
See -- '1080 Keyboard Unit' --.

1. Keyboard Control Card
2. Keyboard
3. External Keyboard or Numeric Keypad (if attached)
4. System Board

Keypad problems.

1. Reseat cable
2. External Keypad
3. Keyboard Control Card
4. System Board

One or more keys do not work.

1. See -- Heading 'KBD' unknown -- before replacing any FRUs.
2. Keyboard
3. External Keyboard or Numeric Keypad (if attached)
4. Keyboard Control Card

Mouse and Pointing Stick problems.

1. See -- '1080 Keyboard Unit'-- before replacing any FRUs.
2. Disable Trackpoint and test Mouse again. The Trackpoint can interfere
with the operation of some Mouse devices.
3. Mouse
4. Keyboard Control Card
5. Keyboard

Cursor floats or moves erratically.

1. See -- 'Trackpoint II Checkout' -- before replacing any FRUs.
2. Mouse
3. Keyboard

External display problems.

1. See -- 'External Display Self-test' -- before replacing any FRUs.
2. External Display
3. Video Card
4. System Board

Incorrect memory size during POST.

1. See ¿Memory Checkout— before replacing any FRUs.
2. Base Memory Card
3. IC DRAM Card

System hang or Intermittent hang.

1. See ¿Undetermined Problem— before replacing any FRUs.
2. System Board
3. Hard Disk Drive
4. Replace the last device being tested
5. Voltage Converter

The system goes into suspend mode after the POST.

1. System Board
2. Voltage Converter
3. Keyboard Control Card

The system does not suspend or resume.

1. Check the Suspend/Resume switch operation. If broken, replace the Voltage
Converter.
2. System Board
3. Voltage Converter
4. Keyboard Control Card
5. Keyboard

The computer does not power-off.

1. Voltage Converter
2. System Board

Real-time clock inaccurate.

1. See ¿Checking the Backup Battery— before replacing any FRUs.
2. Backup Battery
3. System Board

Printer problems.

1. See -- 'Printer Checkout' --

Serial or serial port device problems.

1. Device
2. Cable
3. Serial Adapter (if attached)
4. System Board

Parallel or parallel port device problems.

1. Device/printer
2. Cable
3. Parallel Adapter (if attached)
4. System Board

Internal Data/Fax modem does not communicate with a remote modem or a
facsimile machine.

1. See -- 'FAX/Modem Checkout' --

PS2 command cannot power-off internal modem unless computer is powered-off.

1. Create new PS2 setup program using UINSTALL command.
(Reference Diskette must be 1.10 or later.)

Search Keywords

Hint Category

Hardware Maintenance Information

Date Created

29-11-96

Last Updated

17-04-98

Revision Date

10-04-99

Brand

IBM ThinkPad

Product Family

ThinkPad 700, ThinkPad 720

Machine Type

9552

Model

Various

TypeModel

Retain Tip (if applicable)

N/A

Reverse Doclinks
and Admin Purposes

Symptom/Error	FRU/Action
Power-on password is not reactivated.	1. Check the power-on password switch position.
Problem occurs only when port replicator installed.	1. Port Replicator
No beep and a blank or unreadable display during POST.	1. See ¿Power Systems Checkout— on before replacing any FRUs. 2. Processor Card 3. System Board 4. Video Card 5. Hard Disk Drive 6. Base Memory Card 7. Any option or device 8. Power source in use when failure occurs 9. Voltage Converter 10. Speaker
No beep with a blinking cursor.	1. System Board 2. Processor Card 3. Any Option or Device
No beep with a normal display during POST.	1. Speaker 2. System Board 3. Keyboard Control Card 4. Voltage Converter
No beep and the system hangs with CP XX at the right-bottom corner of the screen.	1. System Board 2. Processor Card
No beep and the system hangs after displaying the memory count.	1. System Board 2. Processor Card 3. Hard Disk Drive 4. Coprocessor
No boot with blank screen.	1. System Board
Extra horizontal or vertical lines displayed on upper or lower half of the LCD.	1. LCD 2. Video Card 3. System Board
LCD screen unreadable or characters missing pels.	1. See important note for ¿LCD FRU Replacement Notice—. 2. LCD Assembly 3. System Board
LCD too dark, unable to adjust contrast or brightness.	1. LCD 2. Video Card
LCD slightly dims when changing to battery power.	1. Normal operation (Dimming of LCD conserves battery power.)
LCD unreadable, illegible, or distorted.	1. LCD 2. Video Card 3. System Board
LCD cannot be powered-on or off.	1. Video Card 2. System Board 3. Voltage Converter
Blank screen, or extra horizontal or vertical lines displayed on upper or lower half of the LCD with no beep or one short beep.	1. LCD 2. Video Card 3. System Board
System status indicator is incorrectly blinking or stays on.	1. System Board 2. Related Device 3. Indicator Assembly
System status indicator stays off, but the POST ends without an error.	1. System Board 2. Related Device 3. Indicator Assembly
No keys on the keyboard work. See -- '1080 Keyboard Unit' --.	1. Keyboard Control Card 2. Keyboard 3. External Keyboard or Numeric Keypad (if attached) 4. System Board
Keypad problems.	1. Reseat cable 2. External Keypad 3. Keyboard Control Card 4. System Board
One or more keys do not work.	1. See -- Heading 'KBD' unknown -- before replacing any FRUs. 2. Keyboard 3. External Keyboard or Numeric Keypad (if attached) 4. Keyboard Control Card
Mouse and Pointing Stick problems.	1. See -- '1080 Keyboard Unit'-- before replacing any FRUs. 2. Disable Trackpoint and test Mouse again. The Trackpoint can interfere with the operation of some Mouse devices. 3. Mouse 4. Keyboard Control Card 5. Keyboard
Cursor floats or moves erratically.	1. See -- 'Trackpoint II Checkout' -- before replacing any FRUs. 2. Mouse 3. Keyboard
External display problems.	1. See -- 'External Display Self-test' -- before replacing any FRUs. 2. External Display 3. Video Card 4. System Board
Incorrect memory size during POST.	1. See ¿Memory Checkout— before replacing any FRUs. 2. Base Memory Card 3. IC DRAM Card
System hang or Intermittent hang.	1. See ¿Undetermined Problem— before replacing any FRUs. 2. System Board 3. Hard Disk Drive 4. Replace the last device being tested 5. Voltage Converter
The system goes into suspend mode after the POST.	1. System Board 2. Voltage Converter 3. Keyboard Control Card
The system does not suspend or resume.	1. Check the Suspend/Resume switch operation. If broken, replace the Voltage Converter. 2. System Board 3. Voltage Converter 4. Keyboard Control Card 5. Keyboard
The computer does not power-off.	1. Voltage Converter 2. System Board
Real-time clock inaccurate.	1. See ¿Checking the Backup Battery— before replacing any FRUs. 2. Backup Battery 3. System Board
Printer problems.	1. See -- 'Printer Checkout' --
Serial or serial port device problems.	1. Device 2. Cable 3. Serial Adapter (if attached) 4. System Board
Parallel or parallel port device problems.	1. Device/printer 2. Cable 3. Parallel Adapter (if attached) 4. System Board
Internal Data/Fax modem does not communicate with a remote modem or a facsimile machine.	1. See -- 'FAX/Modem Checkout' --
PS2 command cannot power-off internal modem unless computer is powered-off.	1. Create new PS2 setup program using UINSTALL command. (Reference Diskette must be 1.10 or later.)

	Search Keywords
	Hint Category	Hardware Maintenance Information
	Date Created	29-11-96
	Last Updated	17-04-98
	Revision Date	10-04-99
	Brand	IBM ThinkPad
	Product Family	ThinkPad 700, ThinkPad 720
	Machine Type	9552
	Model	Various
	TypeModel
	Retain Tip (if applicable)	N/A
	Reverse Doclinks and Admin Purposes