Insignia NS-42PDP Service Manual page 40

(10) YprPb or Ycrcb channel no picture
Check if pin64/66/67 of
NA51 are normal?
Yes
Check resistor
rows RA63~
RA68
(11) D-sub channel no picture
Check if pin64/66/67 of
NA51 are normal?
Yes
Check resistor
rows RA63~
RA68
Check if pin4/7/9 of NB07
output signals?
Yes
No
Check NA51
and peripheral
circuit.
Check if pin4/7/9 of NB07
output signals?
Yes
No
Check NA51
and peripheral
circuit.
No
Check if pin4/7/9 of NB08 output
signals?
Yes
Check NB01/NB02
and the circuit from
X807/X808 to N808
No
Check NB03/NB04
and the circuit from
X807/X808 to N808
38
No
Check NB07
and peripheral
circuit.