I've had 2 devices now that are getting power - have the blue light on the front but nothing comes up on the TV screen at all. Not even the setup screen. Both devices were in use for weeks and working perfectly fine and then just stopped working.

Any suggestions? I've tried the reset button as well and unless there's some special trick to resetting these devices that does not appear to do anything either.

PS: I can't edit original post here but I've tried different TV, power cable, HDMI cables etc. and it's the same thing.

I would suggest you create a ticket and send it in for us to fix it,  http://buzztv.com/rma