A display brightness or standby behaviour can be separate from washing performance. Check whether the manual describes dimming, sleep or energy-saving display states.
Understanding this situation
A screen that deliberately dims after inactivity is different from flickering accompanied by power loss, unusual smells or controls resetting. The exact sequence matters, so avoid interpreting every lighting change as a failed control board.
A useful next step
Record whether the cycle continues and whether normal controls remain available. Use documented display settings only. If the change accompanies electrical symptoms, stop use and seek assessment rather than opening the panel or tapping the display to make it respond.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.