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2.2. Backlight, but no picture
Check if the unit button
and
remote
control
operation?
no
no
Replace
main board
Does
display
yes
menu on 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
OSD
Check if all channels
yes
have no signal?
Replace main
board
22
no
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