The LX4500 software has
to be (S/W) 2.1 or higher and the TV needs to be in OPTION 1.5
Press: [TV] [STAND-BY] ,
[PICTURE] [1] [STORE] , [PICTURE] [5] [STORE]
You must connect the
V8000 to AV1 (AV2 cannot activate the RF-output)
Do you have a Beocenter or a Beosystem?
If so, then it has to be connected to the LX4500 with a 7/7-pin DIN cable and then you can activate the V8000 RF-output by pressing [AV] [V.TAPE]
If you have a link room then you'll have to press [V.TAPE] and the RF-output will be activated automatically, so that you can watch the V8000 in the link room.
This works for me. I also own a LX4500 and a V8000 and these are connected to a Beosystem 7000.
Hope it works for you.