I recently got a Pavoni Pub V1 from eBay for our church group and am
having some problems. I get very good pressure and the steam wand and
hot water tap work great. However, it is not pulling a shot or even
making a sound when I press the shot button .There are only 3 buttons:
single-shot, double-shot, and a snowflake like thing. A small green LED
button shimmers on the snowflake button when I try to pull a shot.

Any advice appreciated? Is it a fuse thing, or a computer circuit
problem?