Thomson DTI 6300 gone off?

Hiya!
I have Thomson dti 6300 - 16. A while ago the screen became blue and I could not operate the dtr. The green light was lighting all the time but it did not respond. I switched it off for about a minute and when I putted it back on no lights appered. The hard drive is working but can not do anything - no any of the lights. I've tried to reset the box as advised but the lights aren't flashing. Does anyone had this problem before??