Some models have display standby or brightness behaviour. Check the manual before treating dimming alone as a loss of power.
Understanding this situation
The important distinction is whether the programme continues normally, controls remain usable and any warning or electrical symptom appears. Flickering accompanied by resets, smell or tripping needs a different response.
A useful next step
Record the timing and current status. Use only documented display settings. Do not open the control panel or repeatedly interrupt the supply to test the backlight, and stop use if there is an electrical safety concern.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.