Troubleshooting Guide - XOCECO PH-42HK6S Service Manual

2. Troubleshooting guide

2.1. No raster
Connect the power, check if
the red indicator is light in
STANDBY?
no
Check if X403 PIN9 (5V) of
main board is normal?
no
Check STANDBY circuit of
power supply board
yes
Press POWER button on the
unit or remote controller and
check the indicator.
Check if the PIN3 of X401 on
main board is high-level?
Check the panel, LVDS wires
or the wires connect panel
and power.
no
Check N304 and its
periphery
blue
yes
no
Check N304 and its
periphery
15
red
Check if the PIN11 of X403 in
main board is high-level?
yes
Check power
supply board