Just like to add my TIVO to the list of boxes that keep powering up for no reason overnight, (TS20 area). It has been happening for about a month now, can't believe Virgin don't know why this is happening, they can't just 'decide' to turn on by themselves
Welcome back to the Community, I hope you're enjoying your week so far.
I am sorry that the box has been turning itself off recently, there has been some interest in this type of issue recently but after test the TiVo, It's clear to see that this is fault related. Your downstream power levels and other elements of the TiVo aren't working as they should be, this will be impacting your boxes actions and creating such a fault.
This will need an engineer and If you can have a little look inside your Inbox, you'll see I've sent you a Private Message. You can find this at the top right of the page, purple envelope.