![background image](http://html.mh-extra.com/html/viewsonic/vlcds25972-1w/vlcds25972-1w_service-manual_1021316032.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 Sharp-
ness or Auto
Adjustment
Adjust Fine
Tune Sharp-
ness or Auto
Adjustment
Refer to
Notice 2
No
Yes
Yes
Yes
ViewSonic Corporation
27
Confidential
– Do Not Copy
VP171/b/s
Summary of Contents for VLCDS25972-1W
Page 13: ...2 2 Exploded Overview ViewSonic Corporation 8 Confidential Do Not Copy VP171 b s ...
Page 46: ...ViewSonic Corporation 41 Confidential Do Not Copy VP171 b s ...
Page 47: ...ViewSonic Corporation 42 Confidential Do Not Copy VP171 b s ...
Page 69: ...10 PCB Layout ViewSonic Corporation 64 Confidential Do Not Copy VP171 s b 1 ...
Page 70: ... ViewSonic Corporation 65 Confidential Do Not Copy VP171 s b 1 ...
Page 71: ... ViewSonic Corporation 66 Confidential Do Not Copy VP171 s b 1 ...
Page 72: ... ViewSonic Corporation 67 Confidential Do Not Copy VP171 s b 1 ...