I'm afraid your box has probably died. You'll need to phone in for an engineer.
Welcome and thanks for posting. I'm really sorry to hear you're having trouble starting up your TiVo®.
I'd like to take a look at this for you but I'm having some trouble locating your account with your forum details so I will send you a private message (purple envelope top right) shortly.
The do's and don'ts. Keep the community welcoming for all. Follow the house rules