Operating instructions

42″&47″ LCD TV AOC L42H831&L47H831
21
4. Abnormal display
Check the source
OK
Reset source
NG
Check signal filter circuit
NG
Replace the filter or inductance
OK
NG
TV signal Check TV system setup
OK
Check TU701
Replace TU701
AV/SV signal
Check the circuit from
connector to U401
NG
Replace the failure
component
Check U401
NG
Replace U401
OK
Check panel
NG
Replace panel
PC signal
HDMI signal Check U507 Replace U507
OK
NG
NG
Check the circuit from
connector to U401
Replace the failure
component