
8050D N/B Maintenance
8.4 External Monitor No Display
There is no display or picture abnormal on CRT monitor, but LCD can normally display.
External Monitor No Display
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| Document |
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| Secret |
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1. Confirm monitor is good and check |
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| Check if J702 | Yes | ||||
the cable are connected properly. |
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| Troubleshooting |
| are cold solder? | |||
2. Try another known good monitor. |
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| MiTac |
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| No |
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| Confidential | R10 | Q6 |
| DDDA | ||
Display | Yes |
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| Check following parts and signals: | |||
OK? |
| Replace faulty | monitor. |
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| Signals: |
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| Replace |
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| U715 | R139 |
| CRT_IN# | |
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| Motherboard |
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| R6 | Q5 |
| DDCK |
No |
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| R785 | Q7 |
| HSYNC |
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| R138 |
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| Q8 |
| VCYNC | ||
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| R136 | L12 |
| RED |
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| R137 |
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| L13 |
| GREEN | |
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| R783 |
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| L11 |
| BLUE | |
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| R135 |
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| L7 |
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