TP 765D/L - Common Device Checkout

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TP 765D/L - Common Device Checkout

Applicable to: World-Wide

Common Device Checkout

If a common device problem is suspected, see the appropriate power supply check in the following list:

Port Replicator Checkout
External Display Self-Test

Port Replicator Checkout

Use the following procedure to isolate a port replicator problem.

1.

Power off the computer.

2.

Remove the failing devices from the replicator.

3.

Unplug the AC adapter from the replicator, if attached.

4.

Remove the port replicator from the computer.

5.

Reconnect the failing device directly to the computer. (If another device is already connected to the computer, remove it first.)

6.

Go to the -- Heading '750HOW' unknown -- and run the diagnostics.

7.

If the advanced diagnostic device test does not find an error, suspect a problem with the port replicator of the system expansion bus.

8.

Power off the computer and reconnect the port replicator.

9.

Power on the computer and run the following advanced diagnostic tests:

Serial port test with the wrap plug installed on the replicator

Parallel port test with the wrap plug installed on the replicator

FDD-2 device test on the failing device with a scratch diskette

10.

If diagnostic errors appear, replace the replicator or diskette drive attachment unit.
If the problem persists after the replacement, replace the system board.

11.

If power problems appear only when the replicator is used, replace the replicator.

External Display Self-Test

If the display problem occurs only when using an external display, use the following instruction to correct the problem.
Note: Before you replace a display, check that the 95XX systems support either 63XX, 85XX, or 95XX displays to see if it is connected correctly.

If the screen is rolling, replace the display assembly. If that does not correct the problem, replace the FRUs in the following order until the problem goes away:

1.

Video card

2.

System board

3.

Bus adapter (if used)

If the screen is not rolling, run the display self-test as follows:

1.

Power-off the computer and display.

2.

Disconnect the display signal cable.

3.

Power-on the display

4.

Set the contrast to its maximum position.

5.

Set the brightness control to the center detent position.

If you do not see a test margin on the screen, replace the display.
If there is a test margin on the screen, replace the system board.

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Hint Category

Hardware Maintenance Information

Date Created

04-07-97

Last Updated

07-04-98

Revision Date

12-03-99

Brand

IBM ThinkPad

Product Family

ThinkPad 765L, ThinkPad 765D

Machine Type

9546, 9547

Model

Various

TypeModel

Retain Tip (if applicable)

Reverse Doclinks
and Admin Purposes

1.	Power off the computer.
2.	Remove the failing devices from the replicator.
3.	Unplug the AC adapter from the replicator, if attached.
4.	Remove the port replicator from the computer.
5.	Reconnect the failing device directly to the computer. (If another device is already connected to the computer, remove it first.)
6.	Go to the -- Heading '750HOW' unknown -- and run the diagnostics.
7.	If the advanced diagnostic device test does not find an error, suspect a problem with the port replicator of the system expansion bus.
8.	Power off the computer and reconnect the port replicator.
9.	Power on the computer and run the following advanced diagnostic tests:
	Serial port test with the wrap plug installed on the replicator
	Parallel port test with the wrap plug installed on the replicator
	FDD-2 device test on the failing device with a scratch diskette
10.	If diagnostic errors appear, replace the replicator or diskette drive attachment unit. If the problem persists after the replacement, replace the system board.
11.	If power problems appear only when the replicator is used, replace the replicator.

1.	Power-off the computer and display.
2.	Disconnect the display signal cable.
3.	Power-on the display
4.	Set the contrast to its maximum position.
5.	Set the brightness control to the center detent position.

	Search Keywords
	Hint Category	Hardware Maintenance Information
	Date Created	04-07-97
	Last Updated	07-04-98
	Revision Date	12-03-99
	Brand	IBM ThinkPad
	Product Family	ThinkPad 765L, ThinkPad 765D
	Machine Type	9546, 9547
	Model	Various
	TypeModel
	Retain Tip (if applicable)
	Reverse Doclinks and Admin Purposes