(For repair/parts) Portable Radio, CD/cassette player (B93) (Knowle B93)

Are you able to repair the sound button on this portable radio, CD/cassette player.

It works from mains power (lead supplied) or batteries. This morning I checked that the radio and CD player worked OK. Sorry couldn't check the cassette player as we've cleared out all cassettes!
The volume did work (at level 3) though the +/- volume buttons didnt .....until they did when decreasing the volume which went to zero and won't now increase! So, If you can repair that then this item may make a good workable item for someone at home or at work, or even an unexpected gift.
Dimensions are approximately 29cm wide, 24cm deep and 16cm tall.
Collection please from B93 Knowle. Hope someone can find a good home for this. Thanks.