![background image](http://html.mh-extra.com/html/viewsonic/vlcds25973-4w/vlcds25973-4w_service-manual_1021324047.webp)
Is screen flickering?
Yes
Change
Inverter
Yes
Is screen scrolling?
No
Change
Main Board
Is LCD line
defective ?
Change
VGA Cable
Yes
Yes
No
No
Change
Main Board
No
Change
LCD Panel
Yes
Yes
No
Yes
Yes
Change
LCD Panel
Yes
No
1
Have line bar or
noise?
Yes
AdjustFine Tune
Sharpness or
Auto Adjustment
Yes
Bad Uniformity?
No
Change
LCD Panel
Change
Inverter Board
Yes
Yes
No
No
Change
Main Board
Yes
Yes
Yes
No
No
Refer to
No
No
Yes
Refer to
AdjustFine Tune
Sharpness or
Auto Adjustment
No
Change
Main Board
Yes
Yes
Yes
End
Notes:
1. Make sure the VGA cable is connected to the PC directly, not via any data transfer or distribution
devices. After this action if the ghost image disappears, go to "Yes"; otherwise go to "No."
2. Check the compatibility of the computer. If it is a compatibility problem, feedback the
information to ViewSonic and go to "Yes"; otherwise go to "No."
44
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VP912s/b
Ghost Image?
note 1
note 2
Summary of Contents for VLCDS25973-4W
Page 30: ...27 ViewSonic Corporation Confidential Do Not Copy VP912s b ...
Page 31: ...28 ViewSonic Corporation Confidential Do Not Copy VP912s b ...
Page 32: ...29 ViewSonic Corporation Confidential Do Not Copy VP912s b ...
Page 81: ...11 PCB Layout Diagrams 78 ViewSonic Corporation Confidential Do Not Copy VP912s b ...