Jvc Lt-65VU3000 reduce backlight from service menu

[alltvrepairs]

Hi,
I have just replaced led set of this vestel tv due to age.
I would like to reduce backlight from service mode. I have tried menu 4725 but in the menu i can't change anything.


Any help pls? I don't want to change from electronics inverter feedback resistor ideally.
Thanks again.

[Diah]

you can only put high value SMD R synce R at the BL circuit which located at the back side of PSU close to the BL socket