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ViewSonic Corporation
Confidential - Do Not Copy
38
7. White Screen
White Screen
Workmanship
LVDS Cable Reinsert
Change LVDS Cable
Check VLCD is 5V
Check Panel-Enable of
U105(pin2) is low
LVDS Cable NG
Check the HWRESET of
U104 exists
Check RP101
Check the pins of
U105
END
OK
NG
OK
NG
OK
OK
NG
OK
NG
NG
Check LVDS signals
OK
Panel Fail
NG
Check
Q101,Q102,Q107,R103
VA702-2_VA721-3_VA721b-3