Whirlpool WSE 2930 W Manual page 77

Troubleshooting
Board self test
The User Interface Board turns ON all LEDs for 3 seconds after each plug-in.
This allow a visual verification that all the LEDs are properly working.
The User Interface board itself can not recognize any failure at this stage.
During this time no operations will be allowed. (e.g. button pressure, function engagements)