No picture on hdmi2

I have a panasonic th-42px60u set with directv connected to hdmi1 and a dvd player connected to hdmi2. Everything was working just fine until i press a wrong button on the remote (don't remember which one) no i get no picture from the hdmi2 input. The input from hdmi1 works just fine. Any idea as to what I did and how to fix it? i have a 42in hdtv lcd, and i have a phillips dvd player with a hdmi connection. so i connected the dvd player with the hdmi cable and i still do not get a picture. can any one help?