Washing machine not spinning out?

Our washing machine is not spinning out It's a hoover xeXtra 6 kg A aa1400 HNL642, is the problem a serious one and would it cost a lot to call some one out, any idea roughly how much the repair might me, I do understand that the electronic my have gone and that would make a difference, in the 70s I would have had a go, I can still do but they are so complicated these day.