BenQ G920HDA Service Manual page 47

18.5" LCD Color Monitor
(2) No picture
Check if the Pin 3, 4 of CN201 are 5V input
Input the sync signal of computer, or
change the cable
No picture
OK
Measure U201 Pin2=3.3V
OK
X401 oscillate waveforms are
normal
OK
Check U401
OK
Check if the sync signal from
computer is output and video cable
is connected normally
NG
NG
Check power board
NG
Replace U201
NG
Replace X401
NG
Replace U401
47
BenQ G920HDA