Vizio -37 goes on 5 second shows NO SIGNAL and goes off

Silly Question ---- Have you tried using more than one HDMI cable on the tv?

Have you find out if the problem is with your remote control? For instance, you are able to control your TV using a Universal remote control. My 32" Vizio TV had a similar problem, initially thought it was related to my remote control but in fact the TV didn't respond either to an universal remote control of my SAT receiver that I eventually use to just turn on and off the TV. I've found out that the problem was with a little board on the TV located at the left down corner viewed from the front side of the TV and that receives the signal from the remote control. I found the board on ebay for about $5, replace it and the TV responded again to both original and universal remotes.

The instructions on letting the Hipi remote to seach for the code that came with my remote are not correct. I used the instructions from HOWTO.COM and printed below. There are two changes from the printed instructions. The first is to push the <TV> button after the <Code Search> button. The second is that the <Enter> button saved the code not the <MUTE> button.

Instructions
1
Turn on the Vizio TV.
2
Aim the Jumbo Universal Remote at the Vizio TV and hold down the "Code Search" button on the remove for roughly 3 to 5 seconds. The LED lights on the Jumbo Universal Remote will come on.
3
Press the "TV" button at the top of the Jumbo Universal Remote.
4
Start pressing the "ON/OFF" button repeatedly until the Vizio TV turns off. (This took only a few tries for my Vizio TV)
5
Press "Enter" on the remote immediately after the Vizio TV turns off to save the code.
6
Test the Jumbo Universal Remote by trying to control the Vizio TV with the remote. If the control doesn't work with the remote, repeat the entire process.

Vizio Service Menu Method 1
1.Turn The TV off.
2.Press and hold the {CH +} & {CH -} buttons on the TV.
3.Then press and release the {POWER} button on the TV.
4.Release the {CH +} & {CH -} buttons.
5.Now press the {MENU} button on the remote.
6.You should get your regular menu up, but with a "F" in the bottom right corner of the menu (This is for factory).
7.Press and hold the {MENU} button for few seconds.
8.The Service Menu will be displayed.
Vizio Service Menu Method 2
1.Turn The TV off.
2.Press and hold the {CH +} & {CH -} buttons on the TV.
3.Then press and hold the {POWER} button on the TV.
4.Keep all three buttons pressed for few seconds.
5.Now press the {MENU} button on the remote.
6.You should get your regular menu up, but with a "F" in the bottom right corner of the menu (This is for factory).
7.Press and hold the {MENU} button for few seconds.
8.The Service Menu will be displayed.
Vizio Service Menu Method 3
1.Press and hold the {EXIT} button on the remote for 3 seconds then release it.
2.Then press the {1} {2} {3} buttons on the remote.
3.To exit, press the {EXIT} button.

I have the same model, and the same problem. The LED changes color and the screen says Vizio, then it goes back into Standby mode.

SEARCHING FOR YOUR CODE

1. Turn on your TV.
2. On the remote control, press TV once; it will
blink once.Then press and hold SETUP until
the TV key blinks twice, then release SETUP.
3. Enter 9 - 9 - 1.The TV key will blink twice.
4. Aim the remote control at the TV and slowly
alternate between pressing PWR and TV.
Stop when the TV turns off.
5. Press SETUP once to lock in the code.The TV
key will blink twice.
6. To search for the codes of your other devices,
repeat steps 1 through 5, but substitute the
appropriate key (e.g., AUX, DVD, AUD, or CBL)
for the device you are searching for.
http://www1.wowway.com/remotecontrol/
Good luck, pls rate it :)

see the vizio website, click on the "support" tab and look in the FAQ regarding programming non-Vizio remotes for Vizio products (#6 in FAQ list), they have all 3, 4 and 5 digit codes there

www.vizio.com/support

when turned on tv no signal comes on a few minutes later deep sleep mode and tv turns on

With out turning on the T.V., Push the [Input] button on the remote control. The TV should turn on and activate the input menu, just continue to push [Input] until it is set on TV (or HDMI, etc.). this should solve your problem.

Power on your TV and press the INPUT button on the side of the TV repeatedly and rapidly until you can change it to a different input, such as AV.

If this does not work. Try this: With the TV off, press and hold the input button on the side of the TV for about 5 seconds. The TV should power on and the input list will appear. Let me know if either of these work.