I answered my own question by reading the manual - gold member perk. I'm also taking myself for a long walk off a short pier for being so stupid. So there's a switch on the side of the Beolabs for setting audio or video for the displays. I might be placing an oder with Steve for another fully wired l-o-n-g PL cable to finish my set-up Annoying how the PL cable I bought from B&O works with my Pentas but not the BL3000s. Anyway, all is solved. Hello, I recently bought a fabulous Beocenter 9500 and a pair of Beolab 3000. The seller kindly included all cables and demonstrated the system to me - all in tip top working order. I drove home and set up the BL's as rears connected by the same supplied powerlink cables to my BV7. A hum emitted from one speaker and no display action at all. I connected the BL's to the 9500 and they worked perfectly again. I'm curious if the displays can work while connected to a BV because there isn't a switch on the rear to select 'audio' or 'video'. I have experimented with 3 different cable types: 1 from B&O dealer in Canterbury (since closed) which was a fully wired cable I use normally to drive my Pentas. 2 from Steve at Sounds Heavenly - a fully wired cable I also use to drive my Pentas. 3 the cable supplied by the seller. All 3 cables will send music and display data from the BC9500 to the BLs but I can't get displays working from the Beovision. One thing I have not yet tried is to daisy chain the Pentas and the BL 3000s and run them from a single PL socket on the BV. Would that even be possible? If anyone can confirm if displays do or do not work with a BV7 that would be a start. Any other advice to help solve the problem will be gratefully received 🙂