DVD / CD player etc needs attention (Cefnsuran Farm LD7)

Sony S-Master digital amplifier as seen but there are more speakers as well. At the moment the display on the DVD / CD player is showing an error code and apart from turning it off and on again (which didn't work) I don't know how to fix it. I'll wait a while before taking it to the tip in case anyone else wants it or any part of the set-up. Contactless collection from one-and-a-half miles outside Llangunllo.