Sony LBT-N300 hifi - not fully working (Lyncombe)

I don't know if there is anyone on Freegle who knows about these music systems, or is in a position to carry out repairs to it, or even if it is possible to repair them. Currently the unit switches on, but the double cassette player nor the CD player play. The turntable works, but the volume control on the tuner for it is very temperamental and requires several turns. There are four speakers with it - as in pic. If interested, please state when you can collect from Widcombe. It is fairly tall and bulky.