1, the TV keeps flashing. The circuit for controlling the high-voltage board switch on the AD board in TV is burnt out. You can cut off the power supply of the set-top box first, and let the set-top box cool for a while before turning it on. R>2. It needs a professional master to take the machine apart for inspection and maintenance. If the TV is still under warranty, it can be sent to the TV brand repair shop for warranty. The above is the solution to press the menu with the voice button on TV and return to flashing all the time.