This TV shuts off after 5 seconds and the standby light flashes 14 times , I unplugged the t Conn Board then the Tv stays on for 3 mins then the stanby lights flashes 5 times any suggestion I also replaced the t conn board

Ken Cook, May 2015

Your TV may well have a problem with its power supply - a component heats up and stops working.

When everything's connected it takes 5 seconds and if the load on the power supply is reduced - by disconnecting a board - it takes longer to get to the failure point.

You can buy freezer spray from electronic stores to spray on suspect components to see if it changes things - it helps to know where to spray it though.

Good luck..., May 2015