My 27" panasonic crt TV turns off no rhyme or reason it could be 15 minutes. It could be 2 hours I unplug power count to 5 and push power button and it comes back on it's 7 years old

Could it be overheating? If you aim a fan at it does it stay on?

Most of the time TV sets attract dust and fuzz like a magnet

Sometimes they need to have the cover removed and blown

Out to get rid of the dust bunny blanket that covers the inside

I am not garenteeing this will solve the problem... There is probably

A solder connection or component that is heating up and breaking down

Finding it may be a little difficult and I would not recommend messing

Around inside a TV with cover off -- leave that to the professionals