Sanyo LCD-22XR9DZ Service Manual page 25

2．Backlight is normal, but there is no picture
Check if operations
of remote control or
keys on the unit are
normal ?
No
Enter into factory menu ，
有
initialize
power off and power on
again,
No
picture ?
Adjust main board again
Change another
main board
Check if OSD menu is
displayed
Yes
after pressing
"menu"?
No
EEPROM, then
check if there is
Yes
normally
Yes
key
Yes
Check if there
TV
is no picture of
all channels ?
No