I recently bought a Mini Vivaldi II and it was working GREAT for me up until this past weekend. Then, I think I choked the machine (was fiddling with grinder and ground way too fine), as the pump sounded like it was working and no water was flowing through, and when I removed the portafilter all I had was a very soupy puck. That said, I was able to pull a few shots the next day with no issues, though pressure and waterflow seemed a little low.

This morning, I turned my machine on and the pump ran for a minute (like when initially setting up) rather than the usual three seconds. I hopped in the shower and went back to the machine, but rather than being fully lit and heated, all the control lights were off except the boiler light, which was flashing. I pressed the boiler button and the light turned off and the temp control lights turned on in sequence as usual. I tried running some water through and only some weak drops came out. Then I pressed the one-cup button and the pump started to vibrate violently. At some point, the three water flow alarms (the yellow temp control lights) started flashing simultaneously. I just turned off the machine and unplugged it at this point.

Any ideas how to fix this?

I came upon this post because I am having the same problem. Second time it has happened to me after the machine has been turned off -- and also running pretty well otherwise for a few years.

The last time this happened I was advised by somebody on this board to remove the little net thing on the intake tube. That worked great, and I suggest you do the same.

For me however, I have already removed it, and its still not sucking up the water, so looking for further ideas.

Good luck.

Do you have one of the softener cartridges in the reservoir? If so remove or bypass it & see if the problem clears up.