I'm really sorry to hear that you're currently experiencing an issue with your TiVo® failing to start up, I'd also like to welcome you to the forums.
I've been able to locate your account and have run some testing, and can see that we are currently aware of an issue that is affecting people in your area. Our technicians are working on resolving the fault, and we hope to have everything up and running by midday today. The reference for this fault is F004382086.
Thank you for updating us with your services in the home.
I've been looking into the fault reference and I've been able to see that the review date is for the 26th. This would have been moved back due to some final checks with the services. If you can come back on or after the evening of the 26th then I'll be able to update youa little more.