The machine is on and says decalcify/ready to use. It does not respond to pushing any of the buttons. It does produce steam if you turn the right knob, but nothing else works. How do I get it to respond?

Have you had the same message for a while, but were able to make coffee? When was the last time you decalcified the machine? Your Syncrony probably needs to be decalcified. But do not use the descalers you usually find in the grocery stores, which are for drip coffee makers. Durgol is one of the best ones and the advantage is that it comes as a liquid (on the powder descalers you have to make sure they dissolve completely before you use them and that you measure the correct amount of water). You can find it online or the only store I could find that carries it is Bed, Bath and Beyond. Turn the machine off and let it cool off. When you are ready, take the water tank off and add the decalcifying solution mixed according to the instructions on the package. If you are using a powder, mix it in a different container. And never pour the solution in the tank while this is on the machine (also, make sure the coffee beans container has the cover on - you don't want any liquid making it into the grinder, as it will damage it). Put the water tank with the descaling solution back and turn the machine on. You will then have to press and hold the button that looks like the number 8 on the side (or the infinity symbol in math) and the machine will start the descaling process. Follow the instructions on the display. Put a large container under the steam wand and turn the knob (the same knob you turn for steam and hot water). Be sure to watch for when descaling is done (you will have a message on the display indicating that). Close the knob, rinse the water tank well, fill it with fresh water and put it back on the machine, which will now need to be rinsed. Place an empty container under the steam wand and push the same (8 on the side) button once, turn the knob. The machine will start the rinsing process. You might have to refill the water tank once or twice before it is finished. Once rinsing is done, your machine will be ready for use or it will ask you to ventilate. To do that, fill the water tank with fresh water, place an empty container under the steam wand, push the hot water button and turn the knob. Let the machine circulate water through. Once the ventilate message is gone you're done.