Problem with Emerson

Check in the menu of the tv do there is any option to select the input source. If so the select there its to hdmi 1. after that turn off the tv and ON again and check do it go back to TV mode.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

USE THE HDMI PORT WITH A HDMI CABLE FROM THE REAR OF THE DIRECT TV BOX TO HDMI PORT ON TV SET THE ON YOUR REMOTE PRESS MENU SCROLL TO THE APPROPRIATE HDMI NUMBER .OR USE VIDEO AUDIO CABLE FROM DIRECT TV BOX CONNECT TO AV CONNECTIONS ON TV SET AND DO THE SAME BY HITTING MENU SCROLL TO AV THAT SHOULD DO THE TRICK....GOOD LUCK

Several things may be happening. Most likely, you need to adjust settings on the cable box for HDMI output rather than component or composite RCA. The same may be true for the TV. Did you check your input source setting on the TV? Also, go into the Video Settings menu and see if the TV asks for types of cable input for video, and audio settings for audio input from the HDMI.

You should check your Denon manual to be sure that the receiver has been set up correctly. My 1913 has many set up options including associating a particular HDMI out connection with a particular source like CBL/SAT or DVD. The fact that you hear sound indicates the HDMI cable connecting the cable box or DVD player to the receiver is working ( at least the sound portion of the HDMI in cable.)

Next, is the HDMI connection you are using to the TV the one selected in the source listing on the TV ? The sound and video circuitry on a receiver are separated and you can hear sound but see no video if the TV isn't selecting the correct source. For example if the TV is set to HDMI1 but you are plugged into HDMI 2. If this doesn't solve your problem try this:

At this point you don't know if the problem is the receiver HDMI connections or TV HDMI connections or a bad HDMI cable. The first thing to try is a new HDMI Cable. If that doesn't solve the problem then do the following.

If the TV has more than one HDMI connection try another HDMI port. Be sure to switch the source on the TV to the new HDMI port ie. HDMI1,HDMI2 or whatever.

If this fixes the problem you are done. If not then Try the same thing with the HDMI out ports on the receiver. Try each one not forgetting to set the receiver to use the HDMI port you are testing.
each time.

Since this can get confusing I would write down what you are testing each time so you don't get lost or confused.

If none of this works then you can try hooking up another TV to the HDMI cable, if you have one. If you do this and you still have a problem it points to the receiver as being the culprit.

The most likely problem is you have misconfigured the system so that is where I started. Each test is dependent on the fact that your system is correctly configured to begin with.

CONNECT IT AGAIN TO HDMI INPUT AND CHANGE SOURCE ON THE TV SETTINGS INPUT SHOULD BE HDMI1

Well verify you have it plugged into HDMI1 by switching to a different HDMI input on your tv. If this still doesnt work, like with PS3 you have to set it up to work HDMI if you had regullar RCA cables hooked up it isnt relaying information to the HDMI cables my suggestion as well make sure you have it sat up in your system to go to the hdmi,. If you were playing before on RCA or Composite cables go ahead and turn it to that channel or input section, turn your Xbox on, go through the settings and have Image output to HDMI..

Maybe the HDMI port in TV is damaged.

Are u using HDMI/1 hook up HD box and signal?The HDMI/1 port still work?Do u use the device in the HDMI/1 port lately dose it work?Replaced the HDMI cable,Unplug the tv about an hour,plug it back in,reset it back to factory setting again.See if this work,not than ur HDMI/1 is shorted.

This site may have what you are looking for

http://www.manualsonline.com/

Had the problem. Turned out to be a defective hdmi port circuit board.