Dyson Hoover (Summertown OX2)

This Dyson is quite a few years old. It was working well, but now the charging unit charges, but the Hoover only runs for a bit. A friend of mine said he would have a look, he thought it was something electrical and fixable. But he never does and now another friend has given me her old one, because she has a new one. SO I am releasing this into the wild of Freegle. If anyone who is more tekkie than me wants to have a go at mending it? Or parts might be useful??