I have a lg 37LC5DC tv and i was trying to hook it up to antenna but i had trouble opening up the setting and menu screen, I tried code 2663 and now NOTHING works. What to do?

SOURCE: Mitsubishi VS-50703

To Fix TV: Press Menu then 1-7-3-0.
Make sure Initial is highlighted in yellow and press Enter.
To get additional input channels:
Press Menu/SetUp/AV Connection/Locked to Input 1: Should be on NO.
 
1(800)332-2119 Mitsubishi Customer Support

SOURCE: Setup and Menu buttons do nothing on my LG LHT854

You need to press "Input" on the remote and keep pressing it until you get to the connection that you are using (e.g.: HDMI, etc). Once on that, you can use the setup screen. It took me several hours to figure that out.

SOURCE: HDMI Video not working on kv-30hs420 but audio works

AmigaDude posts how to reset the video to factory settings here: http://www.avsforum.com/avs-vb/showthread.php?t=766771

The instructions are as follows: 1 - Turn on TV and set input to port being used.
2 - Make sure PS3 is connected via correct cable.
3 - Power on PS3 via power button and HOLD IT for 5 seconds (release after the second beep). It should automatically configure your PS3 to the TV's native resolution for all settings.
Once reset, you'll connect your RCA cables (Red/White/Yellow) and set up the PS3 display settings. To get there from the XMB bar, go to Settings > Display Settings. You might have to disconnect the HDMI cable from the PS3 before the RCA cables work. I don't remember entirely.
Select Video Output Settings > HDMI > Automatic. If you can see the prompt about a max resoultion of 1080i (with your HDMI cable plugged in) you should be good. Select Yes and press X to continue. You can set up the audio but it's not necessary. Select Finish and you should be good.

SOURCE: I don't have cable, so I bought a small antenna to

It's all digital now - don't forget.
You need to switch from cabel to antenna first.
Play around with menus - it has to be there. Or just do areset if there.

SOURCE: I am trying to hook

They have it set so you can't, the hotel would have to OK