Do you know how i can select the tv/pc after selecting L.OPT on the Beolab 3500?

It should simply work with the same command as when you are controlling the TV.

If L.OPT 5 does not work, try L.OPT 4 or L.OPT 6 (the latter is the default setting)

Is the Beolab in a separate room?

Same room but blocked the tv from beo4 signals, Tried the l.opt 1-6 and can't seem any diference between them. When i aim at the beolab 3500, the tv will adjust acordingly but still no sound from the Beolab 3500.

I assume it makes no difference when connecting my laptop through an aux/rca cable with the tv and DVI for video. Sound is playing through the aux cable to the tv!

Try pressing AV before the selection.

i.e AV then PC, or AV then TV.  

On the Beo4, you can add AV, or even AV-PC to the LIST menu. (EDIT: You can add A-PC, which is the same as pressing AV then PC)

Setting the V.opt on my tv did the trick

aymeric wrote:

Setting the V.opt on my tv did the trick

Good news!

So for the benefit of others, what are the working OPT settings for the TV and Beolab?

well i'm not really sure but when i changed the OPT.V setting to 1 on my TV, nothing worked and when i changed it to 2, it WORKS.

I don't know the OPT setting on the BEOLAB 3500, but i think it's 5 or 6.

But maybe more important: When connecting a PC to the TV, the sound ouput is only through the TV speakers, When using scart, the audio IS outputted through the Beolab 3500. 

I'm not sure if the OPT settings make any difference, because i didn't try SCART before.

^ That's interesting - when searching the forum I did find someone who said that the PC audio should be transmitted over masterlink in the same way as other signals.

Did you try the method of pressing AV first, i.e AV then PC?

It was the last post in this thread that mentioned PC over masterlink: 

Out of curiosity, what is the benefit of connecting a BL3500 to a Beovision 6 ?