I still repair and service lots of Linn. Have a pile of Lingos and Klouts etc to work on this week.
Kairn has two major issues with age, original brilliant power supply failure, changing all the electrolytics will cure around 30%, rest are a pain to fix.
Back up battery failure, can leak over the control board destroying lots of tracks on the pcb.
CD players, trying to find original laser mechanisms is nigh on impossible these days, the failure rate of available copy mechs I tried was in excess 85%, and I tried a lot from different suppliers.
I do not charge for something I spend hours on and cannot fix due to lack of spares availability so certain products I no longer take in as it makes no financial sense.