8050D N/B Maintenance

8.6 Keyboard (K/B) /Touch-Pad (T/P) Test Error

Error message of keyboard or touch-pad failure is shown or any key does not work.

Keyboard or Touch-Pad

Test Error

 

 

 

 

Document

 

 

 

 

 

 

Secret

Check

Yes

 

 

 

 

 

No

 

Re-soldering

 

 

 

 

 

U16, J4,J5

 

Is K/B or

 

 

 

 

for cold solder?

 

 

T/P cable connected to

 

No

 

Board-l vel

 

 

 

 

 

Correct it.

 

 

 

 

 

notebook

 

 

 

 

 

 

 

 

Troubleshooting

 

 

 

 

properly?

 

MiTac

 

 

 

 

 

Yes

 

ConfidentialReplace the faulty

L36

 

 

 

 

 

 

 

 

Check following parts and signals:

 

Try another known good Keyboard

 

 

Parts

Signals

or Touch-pad.

 

 

 

 

U16

 

VDD3

 

 

 

 

 

Replace

 

 

 

 

 

 

U715

 

VDD_AVREF

 

 

 

Motherboard

F701

 

KBC X+

 

 

 

 

 

L716

 

KBC X-

Test

Yes

 

 

 

 

 

Keyboard or

 

 

L37

 

H8/T_CLK

Ok?

 

 

 

 

H8/T_DATA

 

Touch-Pad

 

 

R132

 

 

 

 

 

 

KI[0:7]

 

 

 

 

 

 

R151

 

 

 

 

 

 

 

 

 

 

 

J4

KO[0:15]

 

PWRBTN#

 

J5

 

KBD_US/JP#

No

 

 

 

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