Casper 19CSPR, Service Manual

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19 ″ LCD Color Monitor Casper 19CSPR
33
No picture (LED orange)
No picture
The button if under control
X401 oscillate
waveform is normal
Replace U401
Replace X401
Check C423(+) =1.8V;
U404 Vout=3.3V
Check Correspondent
component
Replace U401
Check X401 oscillate
waveform is normal
Check CN404 or replace Q409,
Q410, and U404
OK OK
OK
OK
OK
NG
NG
NG
NG
Check reset circuit of
U401 is normal
Check HS/VS from
CN101 is normal
Replace X401
Check Correspondent
component
NG
NG
OK