Acer AL1922R Service Manual page 37

3. Panel Power Circuit
Check Correspondent
component.
Measure Q402 base is
high level?
OK NG
Check Q203 and Q204 are
broken or CN503 solder?
NG
OK
Replace PANEL
Measure U201 PIN2=2.5V
U202 PIN2=3.3V
NG
OK
X401 oscillate waveforms are
normal
NG
OK
Replace U401
37
Replace U201, U202
Replace X401