WM63 Washing Machine (How do I locate the programer?)?

Hi, I wonder if you can help?

Iv got a Hotpoint WM63 Washing machine that the programing dont work correctly and I have the same spare washing machine which the programer does work but the drum & belt has gone recently.

I need to know what part I need to remove thats responsable for the programing of the washing machine?

Iv opend it up and see there could be severaly parts that could do this?

This is urgent as we have 4 kids no washing machine for 3 days.

Thanks.