W/LED No Backlight
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| Check the 24V voltage input |
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| NG |
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| OK |
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| Check the adapter |
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| Check ON/OFF signal |
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| NG |
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| OK |
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| Check Interface board |
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| Check the voltage of IC801 pin2 |
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| NG |
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| OK |
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| Change Q805.Q806 or Q807 |
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| Check the pin1&15 of IC801 have PWM wave |
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| NG |
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| OK |
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| Replace IC801 |
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| Check Q802,Q804,Q808,Q809 |
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| Drain wave |
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| OK |
| NG |
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| Replace Q802,Q804,Q808,Q809 |
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Check the output of PT801~PT812
OK
NG
Change PT801~PT812
Check connecter & lamp
37
