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TECHNICAL SERVICE MANUAL
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
Is K/B or T/P
cable connected to notebook
properly?
Yes
Try another known good Keyboard
or Touch-pad.
Test
Ok?
No
No
Correct it.
Yes
Replace the faulty
Keyboard or Touch-Pad.
Board-level
Troubleshooting
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.
Replace
Motherboard
Main Board
Parts
U510
U15
U513
X502
SW1
SW2
F2
J2
J4
L57
122
Check
Yes
J2, J4
for cold solder?
No
Daughter Board
Signals
Parts
J5
+3VS
SW3
+VDD3
SW4
+KBC_CPUCORE
SW5
KI[0..7]
KO[0..15]
T_CLK
T_DATA
Prestigio Nobile 1510
Re-soldering.
Signals
KO0
KO1
KI6
KI7
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