TCL LED23E4200 Service Manual page 27

Trouble shooting
1 Can not switch on
no switch on
NO
Check 3.3V/12V/24V of power supply
Check PW
Only 3.3V
yes
Y
Check signal P—ON
Check DC-DC
DIMBL—ON of main IC link
part,check
to PW
N
Y
Check the peripheral circuit
of mail IC,check solder of
Check reset
Check IIC bus
main IC,check data fo NVM
signal of main
and reset it
i
Check crystal frequence