Hi Pilatomic,
In my experience Beo4 screens do fail, but replacement is actually quite straightforward because connection to the PCB is via a little rubber ‘contact strip’ – a replacement strip is provided with the new screen. There’s no soldering or anything complicated. There’s a replacement thread on the old forum but the photos have yet to re-appear: https://archivedforum2.beoworld.org/forums/p/21827/180453.aspx#180453
I did read a post that B&O were going to stop making/supplying new Beo4 screens, but I didn’t have any problems getting hold of some recently. (EDIT: It was David656’s post just above that I’d read! 😊)