![background image](http://html.mh-extra.com/html/viewsonic/vlcds25973-2w/vlcds25973-2w_service-manual_1021320047.webp)
Notice :
1. Make sure VGA cable connect to PC directly and not through a Data transfer or Distribution......After this action if
Ghost image disappear, go to Yes; else, go to No.
2. Check the compatibility on the computer. If it is compatibility problem, feedback the information to ViewSonic, else, go
to No.
Yes
Yes
No
No
Yes
Change
Main Board
Change
Main Board
Change
VGA Cable
Change
LCD Panel
Is screen scrolling ?
Is screen flickering ?
Yes
Yes
Yes
Yes
No
No
End
Yes
No
No
Yes
Change
LCD Panel
Change
Inverter Board
Is LCD line defective ?
Bad Uniformity ?
Yes
No
Yes
Change
Main Board
Have line bar or noise?
Yes
Yes
No
1
Yes
No
Yes
Ghost image ?
No
Change
LCD Panel
Yes
Refer to
Notice 1
No
No
Change
Main Board
Adjust Fine Tune
Sharpness or Auto
Adjustment
Adjust Fine Tune
Sharpness or
Auto Adjustment
Refer to
Notice 2
No
Yes
Yes
Yes
44
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VP191b/s
Summary of Contents for VLCDS25973-2W
Page 34: ...31 ViewSonic Corporation Confidential Do Not Copy VP191b s ...
Page 35: ...32 ViewSonic Corporation Confidential Do Not Copy VP191b s ...
Page 79: ...11 PCB Layout Diagrams Main Board 76 ViewSonic Corporation Confidential Do Not Copy VP191b s ...
Page 80: ...Main Board 77 ViewSonic Corporation Confidential Do Not Copy VP191b s ...
Page 81: ...Control Board 78 ViewSonic Corporation Confidential Do Not Copy VP191b s ...