My tv turns on for 8 sec.and than turns off,without sound and picture?

More than likely it is the power circuit board on your tv that is broken. This is a common issue with bargain price tv. You can call or email the manufacturer and see what they say. If you are out of the factory warranty it might not be cost effective in repairing than just buying a new tv. Go online to Home Theater Magazine and read the reviews on tvs, along with the pro and con of each technology. Panasonic and Samsung are the top brand for quality and reliability. If you read yahoo questions, you will notice that 95% of tv problems comes from LCD or LED tv and 95% of those are the bargain price tv. Hope this will help you out.

Your TV has safety circuits designed to shut it down when they detect problems. There is no way to tell what defective circuit has been detected without a technical analysis using proper service manual and test equipment procedures. A trip to an authorized service facility is recommended.

Your TV has safety circuits designed to shut it down when they detect problems. There is no way to tell what defective circuit has been detected without a technical analysis using proper service manual and test equipment procedures. A trip to an authorized service facility is recommended.