Describe the surroundings
Mention spills, utensils over the controls and whether the surface was hot when the behaviour began. State the function that changed and any warning.
Keep the behaviour distinct
A control that will not accept input differs from one accepting input on its own. Professional assessment can consider the touch area and model operating conditions before recommending parts.
A useful distinction
A single repeated input and several unrelated changes are different patterns. Describe the actual selection that altered, rather than summarising every unexpected beep as a board fault or an induction problem.