When I plug in my LCD TV into my dishnetwork dvr via a coaxial cable I get "no signal found". I've tried a cople different cables to no avail. Any ideas?

Change the input on your TV to the corresponding HDMI port that the cord is plugged into on the back of the TV. (I.e. HDMI1, HDMI2, etc). Then make sure the cable box is powered on. Just because it shows the time, doesn`t mean it`s actually on.

Just make sure you select HDMI as your video source before you take out your AV or component cables. If you don't your TV will say NO SIGNAL, and you will have to plug the AV or component cables back in and then select HDMI. Other than that, it is totally bad a$$!!
That's not correct.
I hooked mine up with the HDMI cable & the PS3 recognized that & asked if I wanted to output on HDMI in the setup screen

Yes, it`s possible to hook up 2 tvs to one dish network receiver. In the dish receiver, there are dual tuners which enables you to watch different channels at a time. So, with the specific cable, you can connect the 2 tvs to the satellite receiver and this is the best way to hook up two tvs to a receiver at a time.if it's 9200 or 9242 you can use 2 TV different chanels.