I cant get any of my inputs to change my kids hooked up the Xbox and now none of the inputs work for cable or DVD its just a blue screen with a no signal can anyone help me tonight please

SOURCE: tv not working

Can you confirm that you didn't have any input signal? My wife once accidentally pressed the reset button on the remote and the TV was stuck in this state. I tried to hook up an antenna to the digital antenna input and let the TV search for a channel. It did find a station and got out of the channel search mode, which was all I needed. Then, I unhook the antenna and continued to enjoy my DVD movie. I didn't check the manual. So, it's possible that there is a better solution. My TV was working fine and I think it just has a terrible user interface. I'm not sure about your TV's condition, though.

SOURCE: blue screen with HDMI

Check the power supply modular cable connection that is by itself in the upper right corner.  On the one my son-in-law has the double yellow jumper wire that connects to this plug in two locations was loose (not properly inserted) in the modular connector and had worked it way out. 

SOURCE: HDMI input not working

I had the same problem with my 50 zenith when it was new. It needs a HDMI board replaced.

SOURCE: no signal when hooked up with a digital cable box

I had the same problem and had the cable guy out and everything thinking it was my box. I figured it out by myself here is what i did to fix it. I have the vizio 32 inch hooked to an hdmi cable and through the cable box i had the aspect ratio on 1080i and i should have had it on 720p once I switched it I havent had the problem since.

SOURCE: Television is not recognizing HDMI inputs

there is a possibility that there might have been a power surge sent over hdmi into the hdmi board on the tv. if on your model the hdmi board is seperate from the sine board then youll have a cheap replacement if not its gonna cost you roughly 300-400 is my guess.

call your repair guy