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8170 N/B MAINTENANCE
8.4 VGA Controller Failure LCD No Display
There is no display or picture abnormal on LCD or monitor.
VGA Controller Failure
1.Confirm monitor is good and check the cable are connected properly.
2. Try another known good LCD
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| Replace |
Display | Yes | Replace faulty | Motherboard |
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OK? |
| LCD | |
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No
Remove all the I/O device & cable from motherboard except extended LCD.
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| Yes | Connect the I/O device & cable |
Display | to the M/B one at a time to find | |||
OK? |
| out which part is causing the | ||
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| problem. |
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| No |
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Troubleshooting
One of the following parts on the
| Parts: |
| Signals: |
U516 | U17 |
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Q3 | Q12 |
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R22 | Q502 |
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Q500 | R515 |
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C506 | C507 |
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F502 | L505 |
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| EVPVDD | ||
J2 | D500 |
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J1 | J6 |
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PJ2 | FA501 |
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L[508:510] |
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U514 |
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| LCDVCC | |
L507 | C513 |
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| BLADJ | ||
C512 |
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| BKL_VMAIN | |
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