Problem with Youview Box

Hi and thanks for reading. I left Talktalk a while ago but have still been using my youview box. It's been very slow and failing to record recently so I Googled what to do and found on this forum some advice to get to the maintenance mode. I have done as instructed but it now won't turn on. It shows waking up and please wait then takes me straight back to maintenance mode. Does anyone have any ideas? Xx

My money would be on the PSU failing with blown capacitors.