Tasker? I'm pretty sure it will do the job.
Link me: Tasker.
What TV? I use IFTTT and Harmony Hub to ensure that my 3 Roku TV's are turned off every night and during the day when no one is home.
Just out of curiosity - why? Is it because it slows to a crawl after an extended time using it? I have a Bravia as well and it's brutal after ~2 weeks.
If all else fails, you could probably use a smart plug and have it just shut off the power each night.