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2.2. Raster, but no picture
Check if the unit button
and
remote
control
operation?
no
no
Replace
main board
Does
display
yes
menu in screen when
press menu button?
no
Enter
factory-menu,
initialization EEPROM,
then turn off the TV,
turn on again, display
picture?
yes
Adjust main board
again
yes
Check
TUNER1
and its periphery
yes
OSD
Check if all channels
yes
have no signal?
Which is no signal
of channels
TV
YPRPB/SCART(RGB)
Check if 1VPP signal
and noise wave of
TP1
on
the
TV
board?
no
Check if output
no
IF
signal
of
TUNER1
(pin
11) is normal?
yes
Check N3 and its
periphery
22
no
VGA/SCART(CVBS)/HDMI
Replace
main board
Check if N5
output signal?
yes
Replace
N5
Replace
main board
no
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