8170 N/B MAINTENANCE
8.7Keyboard (K/B)
Error message of keyboard or
Keyboard or
Test Error
Is K/B or
T/P cable connected to No Correct it. notebook
properly?
Yes
Try another known good Keyboard or
Test | Yes | Replace the faulty | ||||
Keyboard or | ||||||
Ok? |
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Replace
Motherboard
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.
Parts |
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| Signals |
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U17 | U509 |
| IRQ1 | KO[0:15] |
U13 | R78 |
| IRQ12 | KI[0:7] |
U508 L520 |
| T_CLK | ||
J12 | L13 |
| T_DATA | |
L15 | L16 |
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| XD[0:7] | XTAL | ||
X503 R627 |
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| EXTAL | |||
C633 C630 |
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C149 C139 |
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C135 | J15 |
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