It sounds as though the shop did not get the connector mated good enough. You should take it back to the shop and have them remove the screen and reseat the connections.
Briggs & Stratton 190cc Model 120000 Quantum 675 Series Lawn Mower Engine fuel filter is optional. Here is the maintenance manual. See page 6 features and control letter N [Documento: 7065.pdf]
I admit I tore it after having to insert it so many times. I will see if the next digitizer cable makes a better connection. If so, than this one had a bad connector to start with. That is what I was questioning. Each time I inserted the cable it would work for short amount of time and then act as though a letter or number was being pressed.