Sanyo LCD-42XR8KH, Service Manual, Page: 17 / 36

15
2. Troubleshooting guide
2.1. No raster
Connect the power, check if
the red indicator is light in
STANDBY?
Check if X403 PIN9 (5V) of
main board is normal?
Check STANDBY circuit of
power supply board
Press POWER button on the
unit or remote sensor control
and check the indicator.
Check if the PIN3 of X401 on
main board is high-level?
Check if the PIN11 of X403 in
main board is high-level?
Check power
supply board
Check the panel, LVDS wires
and back light board.
yes
no
no
red
blue
no
yes
no
yes
Check N304 and its
periphery
Check N304 and its
periphery
2
2. Tr
2.1. N 2 uble
o ra ho
te
oting g gu de
Chheck N3 ? vel -lev igh s hi d is n bo main m