Insignia NS-LCD32

22
(2) no picture, no sound
(3) with picture but no sound
Check the output voltage of
sockets XP1
,
XV2
No picture, no sound
Check the color of indicator
li
g
ht
I
f XP1 9# is 3.3V?
Blue
Check the power
b
oard
No sound No picture
Power board problem
Refer to (3) checking
p
rocedure
Refer to (4) checking
p
rocedure
No
Yes
Check the power board
With picture but no sound
Check if the voltage of sound amplifier
of XV2 in main board is normal?
No
Yes
Check if RV12, RV13 inputs
si
g
nals
Check NV1 and its
p
eri
p
heral circuit
Check NV3/NV2/NB12
and their
p
eri
p
heral circuit
Yes
No