HCL HCMDLWBT21 Service Manual page 31

15.6" LCD Color Monitor
No picture (LED orange)
The button if under control
Measure CN201 PIN3, 4=5V,
U201 PIN2=3.3V
X401 oscillate waveform is
normal
OK
Measures U401, U403 are
normal
OK
Check HS/VS from CN301 is
normal
Replace U501
No picture
NG
OK
NG
OK
NG
NG
NG
OK
HCL HCMDLWBT21&HCMDLWBN21
Replace the key button
Replace CN201 or U201
Replace X401
Replace U401, U403
Check Correspondent component
31