HCL HCM9LWAN21 Service Manual page 31

19"W LCD Color Monitor
No picture (LED orange)
The button if under control
Measure CN201 PIN5=5V,
X401 oscillate waveform is
normal
OK
Measures U401 is normal
OK
Check HS/VS from CN301 is
normal
OK
Replace U501
No picture
NG
OK
U201 PIN2=3.3V
NG
OK
NG
NG
NG
Replace the key button
Replace CN201 or U201
Replace X401
Replace U401
Check Correspondent component
31
HCL HCM9LWAN21