Troubleshooting Guide - Dynex LC-22HV40 Service Manual

2. Troubleshooting guide

2.1 Panel doesn't light
Turn-on power supply, check
if the red indicator is light in
the STANDBY?
no
Check if XV04 pin11 (5V) of
main board is normal?
no
Check STANDBY circuit of
power supply board
yes
Press POWER button in the
unit or remote control and
check the indicator.
Check if the pin9 of XV04 in
main board is high-level?
Check back light board
no
Replace NC1
green
yes
29
red
Check if the pin11 of XV04 in
main board is low-level?
yes
Check power
supply board