![background image](http://html1.mh-extra.com/html/viewsonic/va720-2/va720-2_service-manual_1020965018.webp)
ViewSonic Corporation
15
Confidential
– Do Not Copy
D P W B N 5 4 0 8
D e b u g P r o c e d u r e
D o e s t h e s c r e e n
d i s p l a y ? ?
Y E S
N O
d i s p l a y o k ?
YES
OSD
debug
(3)
NO
solution with
no display
(2)
loss of RGB??
NO
screen
shaking??
CHK LP1~LP12
CHK U1& C2,C4,
R2 for PLL
NO
CHK R83,84,86,L23
YES
JP2,+12V
INPUT
lost some bits
of RGB?
YES
Yes
Check C6(R)
C11G),C14(B)
NO
VE
7
00-1
VA720-2