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6.4 White screen
6.5 No Audio
White Screen
Check L22, Q9
Change NG component
Check CN5
Check LCD
cable
Change U2
OK
OK
OK
NG
Change CN5
Change LCD Cable
NG
NG
Check
Q10, R98, R76
Change NG component
Check U2
Change Panel
OK
OK
NG
NG
No Audio
L3 open?
Change L3
Check U1
Pin 11= 0V?
Check U1
Pin 1=0V?
Change NG component
No
Yes
No
Yes
Change Q3
Change Q6
No
Yes
Check L8
Open?
Change L8
Check C35, R42
OK?
Change U1
No
Yes
Yes
No
Check U1
Pin 16, 17,
20, 21, 40, 41, 44, 45
Short?
Change speaker
Yes
NO
ViewSonic Corporation
19
Confidential
– Do Not Copy
VG700b-2