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8170 N/B MAINTENANCE
Keyboard or Touch-Pad
Test Error
Try another known good Keyboard
or Touch-pad.(Internal or external)
Test
Ok?
Replace the faulty
Keyboard or
Touch-Pad
Yes
No
Yes
No
Correct it.
Is K/B or
T/P cable connected to
notebook
properly?
Board-level
Troubleshooting
Replace
Motherboard
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.
Parts
U17 U509
U13 R78
U508 L520
J12 L13
L15 L16
X503 R627
C633 C630
C149 C139
C135 J15
Signals
IRQ1
IRQ12
-IOR
-IOW
XD[0:7]
-H8_KBCS
-H8_A20GATE
-H8_MCCS
KO[0:15]
KI[0:7]
T_CLK
T_DATA
XTAL
EXTAL
8.7 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.