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2. Troubleshooting guide
2.1. The panel doesn't light
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 sensor control
and check the indicator.
Check if the PIN3 of X401 on
main board is high-level?
Check back light board
no
Replace N304
blue
yes
no
Replace N601
21
red
Check if the PIN11 of X403 in
main board is low-level (less
than 0.8V)?
yes
Check power
supply board
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