Sanyo LCD-22XR8DA, Service Manual

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2. Troubleshooting guide
2.1. No raster
Turn-on power supply, check
if the red indicator is light in
the STANDBY?
Check if PIN1(5V) of X401
on main board is normal?
Check STANDBY circuit of
power supply board
Press POWER button on the
unit or sensor control and
check the indicator.
Check if the PIN9 of X401 on
main board is low-level?
Check if the PIN11 of X401 on
main board is low-level?
Check power
supply board
Check back light board
yes
no
no
red
blue
yes
Check the backlight
control circuit
no
yes