My wife was messing around with our 1056B01-L Conway Corporation cable remote attempting to change inputs and our Vizio E370VL TV showed a message that said "input lock" and then immediately shut down. Now it will only come on for a few seconds, show the VIZIO screen, and then turns itself off. Are there any quick fixes for this or can this TV be reset? I have tried turning off and then turning back on, unplugging and then holding the power button, holding down the input button and then turning on the TV and none of these have worked.

If you are using an Antenna, Coaxial cable from the wall or a cable/satellite box connected to the TV with a coaxial cable, you will need to do the following steps:
1. Press the INPUT button on your VIZIO remote to view your current input source. Ensure that the TV input is the input that is selected.
2. If the TV input is not selected, press the INPUT button on the remote until the TV or DTV input option is selected.
3. Press the Menu button on your VIZIO remote and select CHANNELS.
4. Select the option that says FIND CHANNELS.
5. Once the scan is completed it will say DONE. Press the OK button on the remote once. This will go back to the channels menu and then you can press the EXIT button to leave the menu.
6. Use the VIZIO remote to change your channels

have you tried to reset tv and change input to see if other inputs are affected

VIZIO Product Support and Services VIZIO Try this site to get it.
http://electronicshelponline.blogspot.com/

Did the TV's source get changed? If you use the Television remote and find the source or input button which switches between the video sources for your TV such as HDMI, A/V, Television Tuner,, VGA connector or Component video. If your using a cable box that remote only controls the cable box and possibly the TV power and volume but the cable box remote does not change the source input of the TV. Most Cable boxes rebroadcast their video on a specific TV channel and your TV must be set to that channel to receive the signal from the cable box. Let me know if this helps you out.

Change the input to some other device and see. Then if the problem persists, this might need attention by a qualified service technician.

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

U look around on the back of ur tv or the side of the tv u see a 3 holes one YELLOW,one RED, one WHITE hole all lable INPUT in a straight in a role that for hook up to the tv if u are using a RCA component cable Y-Video,R-Audio,White-Audio.The other end of the RCA component cable Y,R,W go into DVD player 3 holes Y,R,W OUTPUT holes.

This can happen when there is radio interference near the coaxial cables. Sometimes the interference is behind walls. The solution is to try a different combination of modulation and channel than what the DISH receiver is current set.

The DISH menu screen for this setting is Menu-6-1-5. With dual-tuner receivers, typically "TV 1 Out" is the TV that is connected in the same room as the receiver is located. "TV 2 Out" is the tuner that is fed to the remote TV via backfed coaxial signal.

All that needs to be done is to change the channel and mode going to the effected TV to something different. If your channel/mode is currently set to Air/60, try changing it to Cable/73. When you change the mode/channel in the DISH receiver, you need to set the remote TV to the same mode and channel.

Keep in mind that with some TV companies like VIZIO, they call their "Air" mode "Antenna". With VIZIO's the TV must be set on TV input and then go into the Menu to the Settings, Tuner Settings. Change mode type to match what you are trying on the DISH receiver, exit the VIZIO menu and manually enter the channel number.

Eventually with trial and error, you will find a mode/channel combination that isn't effected by your particular environmental interference.

What model TV do you have?

I just spent an hour trying to fix the VIZIO with the same problem. The screen had no picture at all, but could hear the sound perfectly!! But we i figured out the solution! UNPLUG THE CABLE BOX AND LET IT RE-BOOT! and it WORKED!!!!!