Polaroid TLM-23201B - Troubleshooting: Abnormal Display

32″LCD TV Polaroid TLM-23201B
22
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 TU202
Replace TU202
HDMI signal
Check U502
NG
Replace U502
OK
Check U406
NG
Replace U406
OK
Check U401
NG
Replace main board
OK
Check panel
NG
Replace panel