Thanks MR10 for the manual link and have downloaded the 4000 one . The power link works with a working speaker but the 4000 stays red when the p/link is returned . Not tried line input yet . I’ll open it up again and clean , do i have to discharge anything ? I’ll get some pictures when I get it open . I’ll see how I get on with this 4000 before I look at the 8000 and the beolab 1 , it’s only one of each pair the has the constant red condition .