£15 postage (if you know where to send them)
£50 parts (if the parts can be bought)
£50 labour (for a couple of hours)
£115 for a guess - Is it worth it?
Best bet is to find a little retired chap who will look at them for you but don't bank on a fix. They are probably made in a far away land with no official repair process.
Peccavi
October 2008