All my odd transponders on 101 & 99c have 0 signal strength. Odd & even are working on 103c & 119. I am receiving Detroit HD locals but I'm not sure what transponder they are on. I have a slimline 5lnb split into 2 WB68 multiswitches to 10 receivers. I have verified 0 transponders on 4 of the receivers so far. Any thoughts on what might cause this problem?