External Keyboard

Notes

ŸIf a mouse or other pointing device is attached, remove it and see if the error symptom goes away. If the symptom goes away, the mouse or

other pointing device is defective.

ŸThe computer keyboard does not work when an external keyboard is connected.

1.Power-off the computer.

2.Disconnect the keyboard cable from the external keyboard.

3.Power-on the computer and check the keyboard cable

connector for the following voltages. All voltages have ±a5% voltage tolerance.

Not used

Not used

4.If all voltages are correct, replace the external keyboard.

5.If the voltages are not correct, replace the following

FRUs one at a time until the problem is corrected.

 

Note

 

 

 

 

 

 

 

 

 

If the replaced FRUs do

not

resolve

the problem,

put the original FRUs back

in

the

SelectaDock

Docking System. Do not replace nondefective

FRUs.

 

 

 

 

 

 

 

 

 

a.Keyboard cable

b. Main card of the SelectaDock Docking System

How

to Run

the

Diagnostics

This

section describes how to run the diagnostics for both

the

computer

and

the SelectaDock Docking System.

Diagnostics for ThinkPad

Use either the TrackPoint III or the cursor move keys to interact with the testsEnter . keyThe works the same as

selecting OKthe icon to reply OK.

1.

Press

and

F1hold; then

power-on the

computer.

 

Hold F1

down until the

Easy-Setup

screen appears.

2.

SelectTest

and pressEnter .

 

 

 

 

 

 

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IBM S84H-4552-00 manual External Keyboard, How To Run Diagnostics, Diagnostics for ThinkPad