Select a SETUP menu.
Beo1: Press STOP STOP GO within 3 seconds.
Beo4: Press 0 0 GO within 3 seconds.
Select ordinary menu operation to leave Service Mode.
Then TV Tuner - Picture Adjustments.
If you upgrade to become a silver member, you could download the complete service guide...I suggest you do so.
Ralf
My Beo: Beosound 3000, Beolab 4000, Beo 4 DVD, Beolab 5000/Beomaster 5000, Beovox S45.2 with Stands, Beosystem 7000 black with Beolink 7000, Beolink 1000, F1000 (3 cubes), Beovox 5000, Beovox 3000, Attyca 1.