TV keeps shutting off automatically

Its the electrolytic capacitors located in the power supply board. There are 2 of them.

What connection interface are you using. Can you try connecting another form of media and see the performance e.g connect to a computer or another TV box using another cable. If this persist, please visit a TV repair shop or call your manufacturer.

Short circuited PCB inside it. Any one printed circuit board will have short circuited component/s; in turn draws tremendous current during switch-On, and the short circuit protection circuit inside the TV activates, and shuts it down, is happening now. Contact any service technician, or authorized service centre for Panasonic. This is not a user repairable fault.
If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/

Ensure your TV is turned to computer/VGA input. On your computer use the Windows key + P continuous until it appears on the TV.

Have you checked on eBay , there are some good deals on there ???

Shutdown can be caused by many different things in the set. Do you get an blink codes from the power LED on the front of the TV? You can order boards and get help from the technicians from part suppliers I often use.

www.tristatemodule.com
www.rivervalleyelectronics.net

what made you think of the drive assemble was the problem

Check your power source (electrical outlet) and the power cable. If electrical outlet is ok, try using a different power cable (the cable that you plug on to the electrical outlet going to your TV set). If everything is ok but still no indicator light, call your technician there might be a problem with the TV power supply.

check batteries on ur remote even hide it in other room/if not it could be power supply over heats it
will shut down/another thing go to menu reset to factory default.

Would need model number to search properly. On some sets a capacitor "C2601" of Y-Drive assembly contacts the audio bracket and it is damaged, can cause a abnormal picture.