Trouble Shooting - Hanns.G HSD HG191D Service Manual

19" LCD Color Monitor

8.2 Trouble Shooting

8.2.1 Main Board
No Power
No power
Press power key and look
if the picture is normal
NG
Please reinsert and make sure
the AC of 100-240 is normal
OK
Measure U702 Vout=3.3V
Q702 Vc=1.8V
OK
X401 oscillate waveforms
are normal
OK
Replace U401
NG
Replace U401
NG
Reinsert or check the
Adapter/Inverter
section
NG
Check CN701 or replace
U702, Q702
NG
Replace X401
36
HSD HG191D