I am upgrading a receiver from I'm not sure to a 625 duo dvr. In researchinghere I found out that different LNB would more than likely be needed sincecables are buried in the ground and in the walls. I was hoping that a quickswitch out would be ease but it turned in to being many switch outs. Afterputting the new LNB (DPP Twin) in placeI ran check switch and got nothing. I took the receiver and hooked it up downby the satellite and everything worked fine. After talking with a neighbor hetold me to check for bad wires until he learned of a 4 way splitter. Moving thereceiver back to where the splitter was (taking the splitter out of the equation)everything worked great. This tells me I must have another splitter in thatline somewhere (buried in the wall). The neighbor told me to install aamplified splitter, and upon reading today and searching on where to by one Isee inserters? can anyone tell me which would be the right way?