I only have one COAX to each room and wanted to use 2 tuners, so I took out one of my Zinwell 6x8s and installed a SWM with a 4-way splitter. 5-LNB dish with 4 lines to utility room, split into the SWM and the other Zinwell 6X8. I have 95-100 on all pertinent transponders. Three of the 4 HR-22s came up perfectly, but the fourth is showing 0-100, mostly 0 on the same transponders. Randomly.

If I put the line back on the Zinwell with a B-band I get 95-100s and all is fine. I've tried it on each of the four outputs of the splitter, so not that, also other HR-22s work properly and all the other non-DVR receivers are working fine on the Zinwell. Total run dish to ird is about 125', with connections only at the dish, high-freq splitters, SWM, PI and 4-way splitter. No splices in the runs elsewhere, and exactly the same as all the other receivers in the house.

I've used manual dish selection, no B-Band in use and the box simply won't see the birds. Bad box?