User Guide

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8081
N/B Maintenance
N/B Maintenance
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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
Try another known good Keyboard
or Touch-pad.
Test
Ok?
Replace the faulty
Keyboard or Touch-Pad.
Check
U520, J6, J5
for cold solder?
Yes
No
One of the following parts or signals on the motherboard
may be defective, use an oscilloscope to check the signals
or replace the parts one at a time and test after each
replacement.
Yes
No
Re-soldering.
Parts
U10
U520
J6,J5
F2
L15~L17
SW3
SW4
R55
R56
Signals
H8_VDDA
SA2
IRQ1
IRQ12
IOR#
IOW#
KI[0:7]
KO[0:15]
T_CLK
T_DATA
Is K/B or T/P
cable connected to notebook
properly?
Yes
No
Correct it.
Board-level
Troubleshooting
Replace
Motherboard