I had a repair tech diagnose the problem. He said the Daughter Board was no longer available. I located the board on AppliancePartsPros.com. After I viewed a "How To" video on thier site, I also purchased the two different tapes needed to complete the repair. I am a retired school teacher. NOT an electronics wizard. The total time to repair my cooktop was about an hour. My total cost was under $130.00 Much better than the $1200.00 for a new replacement unit. Shipping was fast and to my door.