My Goodmans GHD8020F2 80gig freeview STB suddenly stopped working?

Hi all, I had just finished watching a recording and it was in the page it goes to at the end of a recording. I went to the toilet and when I returned within 5 minutes there was no power. Fuse is fine and no breaks in mains lead (checked with continuity tester/multimeter) just completely dead.
Its about seven years old and is very clean and in very good condition, the only problems I've had before is it gets a little temperamental when the hard drive is full.
BTW, it has the tick so it isn't obsolete.