Please try turning the power off and on again using an infrared remote or the main power button. Also, try unplugging the power cord (mains lead) then plugging it back in.
If the red LED has stopped blinking, there is not a malfunction.
NOTE: To use the TV in a more stable condition, check if the TV has the latest software version. For more details about Software Updates, refer to: How do I perform Firmware/ Software Updates for my Android TV?
If the red LED continues blinking, please contact a Sony call center.