Does water come out of any of the faucets (bath, shower, kitchen)? If not, then it sounds like you need to turn on the water pump. The switch may be on or right next to the monitor panel. If not there, then it's someplace else, most likely a more prominent location. Flip it on and you'll probably hear it run until pressure is built up.
If you do have water at the other faucets, then as mentioned, your aerator could be plugged. While unlikely, i suppose it's possible there could be a cut off valve under the sink that was shut off for some reason.