Because the new style fill valve is not repairable, I had to replace the complete valve assembly, The fix was fill hose gaskets with screen and replacement of the fill valve assembly.
Did I mention I'm 80 years old?
Back in "the day" I could have simply taken the old valve apart, removed the blockage, flushed the fill hoses, installed the screened hose washers, at minimal expense.
Progress comes with a cost. Not complaining, just observing. I like the new computer controls and all that.