The tv shut off for no reason - Panasonic Televison & Video

Check and replace damaged component/s at it main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. Do asearch by type in the brand name of your device at its search box.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis.

It could be but a couple of other possible reasons---they had problems with this set and its brothers with caps in the main power supply puffing up and causing this "hard to turn on" issue.

A second reason is dust/dirt inside the unit.

All air is coming in via the front of the set and exits the rear--enough dust gets inside and the fans slow down or the lamp gets too hot and set shuts down---don't try this in the house: we take them with back cover off outside the building (on a ramp) and with air clean them out completely--try not to blow it inside the screen. It looks like a dust storm in most cases but can cause exactly the problem you have.

Hello Sir, Hi, The reason why the TV is shutting off, is due to overload. A part or a board inside the TV becomes shorted or maybe foreign objects inside is causing the problem. This may also be caused by a faulty power supply board or loose screws that holds a circuit board. SO have this checked by a technician. If the Power supply board is the reason(usually). A replacement board is necessary. This is no DIY job.

more loose inside your tv that is a reason for your tv shut off you need to resolder the printed board

There is power supply fault inside the TV. it could be any fault up to the E H T circuit. That is the reason the S M P S is shutting down the moment the TV is switched ON.

Do not attempt to repeat. Rectify the fault.

Good Day sir, the reason why your tv act that way is the switching power supply. The power supply regulator, cannot supply the current needed by your TV. these can be caused by several factors. a faulty switching regulator, low power, or filter capacitor leaking, check the voltage across the VCC after the regulator, if possible the switching transistor. and the ic that controls the pulse they are usually near each other. for safety reasons, better consult your service personnel. hope this helps. if you need more assistance, do let me know. thanks

one of your circuits is getting too hot maybe the flyback is going bad,,,one of the two is wrong

The tv shutting off can be explained by some kind of protection circuitry turning the set off.. This can be due to a variety of reasons most common reason being overheating.

sell off the tv & buy a transistor