AOC 917SW - White screen

19" LCD Color Monitor AOC 917Sw
34
White screen
White screen
Measure Q404 base
is low level?
X401 oscillate
waveform is normal
Check CN403 is solder
and Q405 is OK
Check Correspondent
component.
Replace PANEL
Check Correspondent
component.
Replace U401
OK
OK
OK
Replace X401
OK
NG
NG
NG
NG
Check reset circuit of
U401 is normal