No picture.
Press key
MENU
to check if
OSD menu displays normally?
Enter into factory menu
to initialize EEPROM,
turn off the TV set,
then turn it on again,
check if there is picture?
Replace main
board.
Readjust main board.
Check if there is 24V
on power board.?
Do all channels have
no picture?
Which channel has
no picture?
Check DIF output
from TUNER0-
PIN13 &14.
Check TUNER0
and its peripheral
circuits.
Replace
main board.
Check if pressing keys on
remote control or key board
can operate the TV set?
N
Y
Check if there is backlight?
Y
Y
N
Y
Replace
main board.
Y
Replace main
board.
N
OTHER
TV
N
N
Check power board.
N
N
Check if the voltage of
X604-PIN10 on main
board is high level?
Y
Check backlight of
display panel.
Y
N
Replace main board.
Y
2. No picture.
Replace main
board.
Y
Troubleshooting Guides
