Originally Posted by Grider
... What next?
If you still have the shore water line connected & turned on, then the onboard pump will see that pressure, and not do any pumping.
Assuming it is not, check the voltage at the pump - it is probably wired in with wire nuts which can be unscrewed. You may just have have turned the switch off, and not realized it.
If the pump has power, then proceed cautiously. Drain the freshwater tank, acquire towels, and then disconnect the pump's outlet line. If the pump is good, the towels will be needed for residual water in the line. If the pump makes no sound, then I recommend the FloJet VSD from PPL in Texas.
Regardless, please post the results.