DT16300 won't switch on - rebooted, unplugged etc still no response?

I have a thomson DT16300 Digital TV recorder, which is under 12 months old. Been working fine. Tried to switch it on today and it won't switch on. I've re-booted via the mains (several times), it goes through the full sequence, green amber red flashing lights, but nothing. The conflict/troubleshooting guide is no help what soever! Has anyone else had the same problem, and if so any advice?