If it is, you'll need a swap out, which unfortunately means you'll lose any recordings. Time to watch them while its still working (ish) then call it in on 150 or wait for staff to pick it up on here...
Welcome to the Community, I'm sorry to learn about the problems you're experiencing with your TiVo box lately.
I'd like to take a look at the box remotely but I've not been able to locate your account to do that unfortunately. So that I can run some tests, would you be able to respond to the private message I've sent with the requested information?
You can view the message by clicking the purple envelope on the top right of the page.