I do have a flasher on the TV. No signal going through. I also ran a cable from the MRF350 to the IR in port on the back of the matrix for controlling the actual matrix switching and it doesn't work either. It seems an incompatibility with the IR output signal of the MRF350 and what the matrix accepts. I'm no IR expert in any way. But I don't see now they can be incompatible. It's just a signal wire and a ground wire, right? Is it a voltage output issue? The MRF350 actually has variable signal on each output and I tried it at multiple levels with no change. Can't figure it out.