Troubleshooting Guide - Insignia ns-lcd37hd-09 Service Manual

2. Troubleshooting guide

2.1 No raster
Turn-on power supply, check
if the red indicator is light in
the STANDBY?
no
Check if XV4 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 PIN7 of XV5 in
main board is high-level?
Check back light board
no
Replace NC1
green
yes
29
red
Check if the PIN13 of XV4 in
main board is low-level?
yes
Check power
supply board