We purchased this new 5 years ago and although it has worked reliably I believe the motherboard has gone past its life use.  We have little to no water flow and instead of a green light at the base of the spout it is blue. Can I purchase an updated replacement motherboard that would be appropriate for this facet? Secondly out switch that turn from spray to is broken. can I replace the sprayer attachment or do I have to replace the entire facet?