BUFFALO FTD-G931AS/BK
18
7.2 PWPC board
No Power
White screen
Measure Q204
base is high level?
Measure U202 PIN2=3.3V
U201 PIN2=1.8V
X401 oscillate
waveform is normal
Check Q203 is broken
or CN503 solder?
Check Correspondent
component
Replace PANEL
Check
Correspondent
component
Replace U401
OK
OK
OK
Check Correspondent
component
OK
NG
NG
NG
NG