Demineralize I am not getting any flow of water. I did not use the machine for two months so I believe the mineral build up is large. I have very hard water but we do use a water softner. Is there any way I can take the back/bottom off the coffee maker to see if it actual is a large build up of mineral. Thanks

First, I'm not a Keurig technician. Since your machine seems to be calcified then the vibration pump is probably clogged or at least the vibration one way valve is stuck open. I DO NOT recommend De-scaling as it causes more problems if the wrong chemicals are used and gets stuck in the machine. Most warranties are voided unless recommended or performed by the MFR. (most just replace the machine, which hints to how hard it is to De-scale a machine.)
- Water not getting to machine or not sensing that the water tank is already filled.
* There usually some type of float near to middle of the water tank. It's usually white or colored plastic. This 'float' needs to move freely up-down to 'sense' the filled tank. clean the tank and shake it -note the movement of this float. It will need further cleaning if it's stuck (or you will have to replace tank if it's crudded up).
* Re-install tank and fill with filtered water. Turn machine off, count to 15 then turn on again. This usually turns on pump to add water to inner tank. If this does not happen then there is a CPU problem. If it does hums for 5-10 seconds then goes off but no heating then the pump may have an air bubble in line. Try the turn off and on method several times (up to 5) to get the water flowing. If it's still not working then there is a clog in the pump and will need service and/or replacement.
* Did you change water source? Since this is a table top machine in which you fill the water tank. Try to use filtered (bottled ok) water. Do Not use Distilled or 100% pure water as this type of water will eat out the metals from your machine! Some places use a water softener as it tends to be better for the machine long term (years).
* Still got problems? Check with vendor or MFR for service or replacement. Most machines of this type do not have serviceable parts or adjustments.
* Final, Okay, sounds like you opened (voided warranty) the machine already. I don't recommend any repairs on these table models as it's preferred to exchange them during the warranty period. ******************************************************************
*** But if you must tear this particular unit apart then do so very carefully *** At your own Risk! *** The following is just information:
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The pump is usually a round cylinder about 1-2 inches round. There is a white nylon tube at one end and another tube out the back which may or may not have a 90 degree elbow fitting. Your looking at the longer end. Set a dry tower and remove the longer white end. There may be clips or screws that holds it together. Be aware of how the pieces come apart and what order. (there may be videos of this on youtube but I haven't checked. Maybe I will do one later.) Expect a small pen size spring (same as an old ball point pen but shorter) and a very tiny metal or nylon ball or bullet shaped piece. Make sure these are cleaned of calcium and sand. Puff out any bits of crud or use a pipe cleaner. Make sure everything is clean. The plunger can be removed and checked but make sure you put it back the same way. This is very TEDIOUS and a lot of labor. This is why it's better to just replace the whole unit. You have already spent an hour just to get to this point. Clean and re-assemble everything. Put back together and refill tank with water. Power up and test.
* Still not working? Junk it. (Keep the pot and cups) Look for a more heavy duty unit as it seams your a heavy coffee drinker and could use a semi pro machine. "Hey, Look at my cool Espresso Machine! Cappuccino anyone?"
Aloha, ukeboy57