Hi Graham, yes the clock(control) is bad.
That needs to be replaced, its easy to do no soldering just plug in connectors, take a pic before removing the wires so you know exactly where each goes back on the new clock (TIP)
The Best place to get a new clock clock control, is : http://www.ransomspares.co.uk/
But since there are so many different ones literally hundreds, I would call to place the order. Also they will ship same day in most cases if the part is available.
Please call Ransom Spares: 0844(###) ###-####a href="http://www.ransomspares.co.uk/" target="_blank">Home » Parts » Kitchen Spares » Cookers & Hobs » Neff
In any case, I will stick with you until this is complete.
Please rate my service kindly.
Also it is the only way I am credited for my time and expertise with you.
Once you rate, I will be notified and will add your question to my priority list so you can reach me anytime until this problem is solved.
Then you can reach me by simply replying to this message anytime.
Thank you and have a great day Graham!