I'm near Ludlow. If you know somewhere who services Cyrus amps at a more reasonable price I would be interested.
Back to my original problem I think the amp may be OK
I found a poor joint on a cartridge tag, the one that shares the earth for the tonearm. Fixed this and connected a phono amp I had and all sorted, sounds far better than the CD. Might treat the amp to a service at some point as all I have done is change a fuse since I bought it new.