No. The display and heating functions are different loads and may be controlled differently. A lit clock does not identify why a selected cooking mode is ineffective.
What the observation means
Check only the normal user settings, including timing and confirmation requirements. Do not infer that a particular element must be faulty because the clock is visible. The same symptom can have several explanations.
A useful next step
Report which functions work and which do not, using observations from ordinary use. Leave supply and internal-circuit tests to a competent person. Do not remove covers or touch terminals to confirm that power is reaching a heater.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.