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ViewSonic Vg930m3 Service Manual

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ViewSonic Corporation Confidential - Do Not Copy    VG930m-3_VA930m-1 
 48
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ViewSonic Corporation Confidential - Do Not Copy    VG930m-3_VA930m-1 
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16. ( Take down the screws of main board & then take down the main board)
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ViewSonic Corporation Confidential - Do Not Copy    VG930m-3_VA930m-1 
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17. Tear down the around hook outside, and then take down the Bezel.
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ViewSonic Corporation Confidential - Do Not Copy    VG930m-3_VA930m-1 
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18.Take down the main hob around the sides of  screws, and then take down the main hob.
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ViewSonic Corporation Confidential - Do Not Copy    VG930m-3_VA930m-1 
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6. Troubleshooting  Flow  Chart 
Main Procedure 
Start
Connect all of devices to
the LCD monitor
Power On
Is indicator LED light?A. Power Circuit
Troubleshooting
Yes
No
1
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ViewSonic Corporation Confidential - Do Not Copy    VG930m-3_VA930m-1 
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Is backlight on?
Display Performance
O.K.?
Function AdjustmentO.K.?
Audio Function O.K.?
No Trouble Found
End
B. Backlight
Troubleshooting
C.  Performance
Troubleshooting
D.  Function
Troubleshooting
E.  Audio
Troubleshooting
Yes
Yes
Yes
No
No
No
No
1
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ViewSonic Corporation Confidential - Do Not Copy    VG930m-3_VA930m-1 
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A. Power Circuit Troubleshooting     
Start
Change AC/
DC Adapter
Retry Power On
Change Main
Board & Retry
No Trouble Found
End
End
End
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B. Backlight Troubleshooting     
Start
Change
Inverter and Retry
No Trouble Found
End
End
End
End
BacklightChangeModule
Change Main
Board& Retry
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ViewSonic Corporation Confidential - Do Not Copy    VG930m-3_VA930m-1 
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C. Performance Troubleshooting     
Start
Screen is
flickering?
Change VGA Cable
Change Main
Board
Bad Uniformity?
Is screen white?
NO
NO
Screen is
scrolling?
LCD Line Defect?
Change
Inverter Board
Change LCD Module
Change LCDModule
Check
ConnectorChange Main Board
Change LCD
Module
NO
YesNoChange Main Board
NO
NO
2
NO
YES
YES
YESNO
YES YES
YES NO
YES
YES YES YES
YES
YESYES
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