AOC HP L1906 Service Manual page 34

19" LCD Color Monitor
No picture (LED orange)
Measure U601 PIN2=3.3V U602
PIN2=1.8V
X301 oscillate waveforms are
normal
Check if the sync signal from
computer is output and video cable
is connected normally
No picture
OK NG
OK NG
NG
OK
Replace U401
Replace U601, U602
Replace X301
Input the sync signal of
computer, or change the
cable
34
HP L1906