The iron or steamer may not be switched on. Take the appliance out of the storage compartment and press the on/off button on the appliance once.
The automatic Calc-Cleaning process may be in progress or the rinse tray is full. Wait until the Calc-Cleaning process is finished. During Calc-Cleaning, the power-on light blinks for 3 minutes. After Calc-Cleaning, the rinse tray light blinks and you will hear a few beeps. Empty the rinse tray and put it back in place. Then switch on the iron/steamer.