You should hear the boiler heat up the water. When you pull/push the trigger, a pump should be activated and steam should be released. If the pump is not working, it could be a defective capacitor acording to this article:
https://lieven.kks36.be/2016/06/11/philips-perfectcare-aqua-does-not-pump-solved
A spare capacitor should cost you no more than a few dollars, just find somebody with electronics/soldering repair skills.