Issue saeco aroma

[jordanp]

Hello everybody, (sorry for my english, not my first language
My problem is : when I press the button to get a coffee on my saeco aroma, I'm hearing the pump working, then the water goes into the portafilter but don't flow out. At this point, the pump seems silenced but still work.
To resolve the problem I tried a lot of solution :
-descaling the machine
-priming the pump
-cleaning screenshower, portafilter and gasket
-tried with coarser coffee (I tried with no coffee and still the water have a lot of trouble to flow out the portafilter)
Sadly, none of those solution resolved the problem...
Thanks guys for your help !!!
Jordan