Service manual

17" LCD Color Monitor AOC 712Si
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9.2 Trouble Shooting
9.2.1 Main Board
No Power (No LED indicator)
Rewrite SW
Check U3, U4=5v
Check U2 su
pp
l
y
volta
g
e
Check adapter and
connector
Check key circuit if ok
Check U2、U3
and U4 if OK
Change defective component
Check U2 （pin PWR、RST ）
Change defective
OK
OK
OK
NG
NG
NG
NG
NG
Change defective
component
NG