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6.3
No display on screen (LED is green).
Is the backlight lit?
Check that the cable is
fully connected to CN401
Check:
1. C262 is O/P 2.V.
2. IC253 is O/P 3.3V.
Check C255 is O/P 5V.
IC251. D251 failure
Failure point
The cable is disconnected
Failure point
1. D252, D253 failure.
2. IC253 failure.
Check that the cable is fully
connected between the inverter
and interface board.
Check CN302 pin8 is 12V,
pin3 is 5V
Inverter failure
Failure point
The cable is disconnected
1. Check Q309, Q310.
2. Check FB315, FB316
Yes
Yes
Yes
No
Yes
Yes
No
No
No
No
No
25
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG910s/b
Summary of Contents for VG910b-1
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Page 65: ...62 ViewSonic Corporation Confidential Do Not Copy VG910s b 11 PCB Layout Diagrams Main Board ...
Page 66: ...63 ViewSonic Corporation Confidential Do Not Copy VG910s b Main Board ...
Page 67: ...64 ViewSonic Corporation Confidential Do Not Copy VG910s b Power Board ...
Page 68: ...65 ViewSonic Corporation Confidential Do Not Copy VG910s b Control Board ...