Trouble Shooting; Main Board - Asus MM19D Service Manual

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 U201 PIN2=1.8V
U202 PIN2=3.3V
OK
X601 and X401 oscillate
waveforms are normal
OK
Replace U601
NG
Replace U401
NG
NG
NG
Replace X601, X401
32
Reinsert or check the
Adapter/Inverter
section
Check CN201 or replace
U201, U202
ASUS MM19D