The corporate Panasonic Service Center in Elk Grove Village is the only place with Panasonic experts and all the necessary parts to return Panasonics to new or better than new functional condition.
I hope that you included with your machine a description, similar to that in your post, so the specific problem(s) with the EZ485 may be addressed and corrected in a prompt and efficient manner.
Yes there are those critical of the Panasonic Service Center at Elk Grove Village. But for every dissatisfied person (that may post “a tale of woe”) there are probably one hundred others fully satisfied persons (that do not post describing their experience).
Shipping through UPS Ground is the variable factor, especially this time of year. Elk Grove Village is near Chicago’s O’Hare airport. The down time, from shipping the machine off to Elk Grove Village until it is returned is usually no more than two weeks.