T.V. turns off by it self right as i turn it on

Your Television is going into the protection mode. This is usually caused by some component failure. You can call Best Buy customer support at this telephone number 1-888-237-8289. They may have in house service for in warranty products. You can also call the Insignia customer support at this telephone Number 1-877-467-4289. The Insignia customer support website is www.insignia-products.com. Go to the customer support section and tell them the model number of your television and ask them for help. You should be able to get help from these sources as they will have all the correct service information for your television. I hope this information helps you with your problem.