AOC envision L37W431 Service Manual page 28

37'' LCD TV
3. Abnormal Display
Check the source
OK
Check signal filter circuit
OK
NG
Reset source
NG
Replace the filter capacitance or inductance
RF signal
AV signal
PC signal
OK
HDMI, DVI signal
NG
Check U301 Replace U301
OK
NG
Check U302
Replace U302
OK
NG
Replace U501
Check U501
OK
NG
Replace panel
Check panel
Check TV system setup
OK
NG
Check TU100 Replace TU100
NG
Check U104 Replace U104
NG
Check U102 Replace U102
NG
Check U411
28
Replace U411
Envision L37W431