I am having a issue recently where the hu no longer sends a video signal to rear monitors? This started about six months ago and would be resolved by performing a hard reset (unplugging) the hu. The only thing I have changed is I added a second monitor. Now it seems to happen weekly. I've checked and ran new rca cables to the other monitor,I'm guessing this could b the hu or the rca from hu to monitors. Has anyone else had this issue?

Yes, I'm experiencing the same thing. All 3 rear monitors in my Excursion are not working. I also ran new rca wires....no luck. I'll try a hard reset tomorrow.

Do you have any other suggestions?

Jerry 

Is it possible that the hu isn't putting out enough to run all 3 monitors? Can I run a video amplifier that might fix this?