Keeps turning its self off

Do a reset to this set, and then check. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.

I would start with a look at the power supply for puffed up caps.

Take a look at photos to see if similar but different in physical size with a plus mark on one side and a minus mark on other side


Note that on rather large ones it is normal for the black plastic on top to appear lifted--on regular caps with silver tops it is not.

You should check the settings for sleep. You may have accidentally set it to sleep for every 5 minutes!

You have a bad audio output IC in the main board, you have a couple options as long as you don't use the sound from the TV...one is order a new main but if it was me I would take the back off and follow the wires that go to the speakers and unhook that plug.

This tv have power supply problems,take it back to retailer demand an exchange or call Panasonic for a warrenty repair.

Swollen ( bad ) caps in power supply first place to look.............T.

if you are comfortable taking the back cover off, do it and visually inspect a cylindrical shaped components on the power supply unit... if you can send a picture please do [email protected]

try adjusting your color tuners located inside tv behind speakers.

i have a nlc-3204bc funai hd ready, the stand by light keeps flashing red on and on, can not switch it on