Mitac secret confidential document, 6 keyboard (k/b) touch-pad (t/p) test error-1 – MiTAC 8050QMA User Manual
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N/B Maintenance
N/B Maintenance
8.6 Keyboard (K/B) Touch-Pad (T/P) Test Error-1
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
J4, 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
U13
U14
U709
X2
SW3
SW4
F2
J4
J5
L48
Signals
+3VS
+VDD3
+KBC_CPUCORE
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
MiTac Secret
Confidential Document