Unplug the appliance.
Take out the 6 screws across the top of the inner door and down the sides for the depth of the facia panel.
You should now be able to take the facia panel off.
Two types of knob have been used.
1 clips in and the other is a push fit.
Unclip the knob from the inside and take it off.
Lift the knob and pull it out.
Take the screws holding the control board in place out.
Transfer all the parts to the new facia.
Fitting is the reverse of the removal.
Check it out, see how you get on and get back to me if you need more help.
Hope this helps
Let me know how it goes