Hmmm, you say you checked the voltage at the dish and it was 18v and higher??? How much higher one or two volts, or more? It should max out at 18.*V (if anything it should be a tad lower, allowing for line drop). Do your receivers have two or three prong power plugs? If it has three prongs, try using a two prong adapter to eliminate the ground post of the plug, then recheck the voltage. Another thing to try is to plug the receivers into different circuits than they are presently using (use an extension cord if need be, just be sure its truly plugged into a different circuit). We had one tech blow up four receivers on one job. Every time he plug one up the sparks flew and smoke poured out of them. He didn't think there was anything wrong with the circuit because the customers sound system was using it with no problems (sound system had two prong plug, receivers all had three). When the tech used the two prong adapter the receiver worked fine.
A line of sight issue will not cause the loss of even transponders and still give you odd ones. These things usually occur because of problems with either 1. wire, 2. LNB, or 3. receiver. The dish itself can't cause it unless it is out of line. If you are getting the odd transponders then you should be getting programing on some of the channels sent out by the 119 sat. Are you getting both odd & even transponders from the 101 & 110 sats? What are the signal strengths there? And on the 119 what transponder are you actually getting a signal from?
