No he probado aún, pero se supone que de alguna de éstas formas.
La cosa es si alguien ha toqueteado algo y si sabéis si se puede activar el bluetooth o algo que valga la pena.

a mi me ha funcionado la opción, con la TV apagada:
Info + Settings + Mute + Power

Código:
    Service Menu Code For Samsung TV:

There are many codes available for accessing service menu in various Samsung TV models. You can try following codes one by one until you get access to service menu:

First try following method. It works in all new Samsung TV series:

Method 1: DO NOT power off your TV. Keep it ON and then press following buttons quickly on your TV remote:

Mute + 1 + 1 + 9 + Enter

Here "Enter" button is the OK/Select button present in the center of Left/Right/Top/Bottom buttons. It'll open secret service menu which allows you to turn on/off Hospitality Mode/Hotel Mode, etc.

Other Methods:

If above mentioned method doesn't work for you, try following methods:

First power off your TV using the remote, then press following buttons quickly on the remote:

Info + Settings + Mute + Power
Mute + 1 + 8 + 2 + Power
Mute + 1 + 1 + 9 + Power
Display/Info + Menu + Mute + Power
Display/Info + P.STD + Mute + Power
P.STD + Help + Sleep + Power
P.STD + Menu + Sleep + Power
Sleep + P.STD + Mute + Power

You can press Channel Up/Down buttons to navigate between available options. To change their values, press Volume Up/Down buttons.
Éso si, el modo BT_AUDIO está en ON pero donde debería aparecer el BT ADRESS pone NO SOPORTADO.
La otra cosa que me estaba planteando en desactivar el TV+, para que no salga lo de rakuten TV en los canales 1000, 2000 y 3000 (o algo así).
Y luego no me atrevo a tocar más cosas.