jvc auto shutdown

This may not help, but it's what I would try.
Are you sure your television is tuned into whichever channel you are trying to see?
Are you sure your television was built to receive the type of signal you are trying to view?
(In the U.S., the television stations started braodcasting a digital signal, instead of the
old analog type we used to have. Is your broadcast station, (or cable input?), using the
correct signal for the television you have?)
Are you sure whatever you are using to recieve your input signal has tight, undamaged
connections?
(Did the connectior with the antenna or cable come loose?)
Is your 'shutdown' a complete power shut-down, or a blanking of the screen?
(Some TV's will remain powered, but the screen and sound will go dark if the receiver
inside the television is not picking-up an input signal).
I'd start there, and get back to us, if you're still having no success.
Good luck, I hope it's a simple signal input problem and not a circuit failure.

 

Since you can't see the menu on your screen, I'm thinking you have a circuit problem
that will require repair. I can't think of an easy way to diagnose a problem like that
without troubleshooting the electronics with the schematic in front of you.
One last thing I'm wondering about:
Was this TV functioning alright, and just started failing, or is this a TV you acquired
from somehere, and are just now trying to use?
Once again, I'm wondering iif this TV was built for the U.S. market or for your, or some
other country, because the over-the-air transmission the TV could be looking for, may
be different. (Analog, digital)
How good is your antenna?
Is the signal from the broadcast station strong enough for the antenna you're using?
If the TV is designed for your area, and it's input configuration (a lot of TV's have
several types of input selections to chose from, like computer input, standard TV, and
other selections,... you might want to check the push-buttons on the remote or the TV itself to make sure you have the correct input type selected) is correct. You're
probably going to have to find someone to repair it, if you can't do it.
I'd check the input selections first, to make sure the selection is correct.
It sounds like you've checked most of the other things I'd try already.
Again, good luck with this.