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ViewSonic Corporation
Confidential - Do Not Copy
VG921m-4
59
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 LCD
Module
Check
Connector
Change Main
Board
Change LCD
Module
NO
Yes
No
Change Main
Board
NO
NO
2
NO
YES
YES
YES
NO
YES
YES
YES
NO
YES
YES
YES
YES
YES
YES
YES
Summary of Contents for VG921m-4 VS11369
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Page 48: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 45 Setp4 3 Check the DDC...
Page 56: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 53 16 Take off the bezel...
Page 78: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 75 11 PCB Layout Diagrams...
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