Hi Woodewood, Very odd behaviour. If it doesn't make any difference to power it down for ten minutes and restart, I would expect an electronic element has expired. It might be time to find a trusted service centre and have it inspected.

Thanks Pepps After I posted this last night, I sprayed the 'button' panel (and as far behind as i could get) with Isopropyl Alcohol 824 spray. After allowing to dry off. After letting it sit for an hour, all the buttons started to work physically again and did so until I turned in for the night. This morning when I returned, it was as before, the buttons has stopped working? If you or anyone else have any further suggestions that would be fabulous. But if not then I'll take up your suggestion and take it to a trusted service centre (anyone know anywhere around Gloucester?). James

There's a video explaining how to dismantle the BS Century here: https://www.youtube.com/watch?v=vAQuwc6z6vk And if you go to about 9 mins 30 secs you will see the little display board being removed.  It is only connected by a little white 9-pin connector, so perhaps this has come loose or has a bad/corroded contact?  I would avoid spraying any more IPA because this could easily cause problems elsewhere. If the connector is not at fault, you may be able to strip down the display/button board further, or look for a replacement. EDIT:  Sometimes these videos can be a little 'hit and miss'.  The Service Manual is available on Beoworld to Gold/Silver forum members but I had a look and it is of limited help in this instance, except to identify components.

Hi Guy Thank you so much for this, I will get onto this and strip it apart – you are right about the IPA, the tape deck did not like it (no transmission to the tape rollers now), i'll take a look at this too when I've stripped it down!. I'll let you know how I get on! Regards   James