Can you fix a freeview box which has frozen at startup. ?

Can you fix a freeview box which has stalled at startup. starting shows on box screen, but does not progress any further. box makes continuous whirring noise but no clicking. Have tried unplugging and waiting which did not help. Do not want to loose recorded programs on hard drive. The make is a tvonics dtr z250.
B, April 2016


done
Could be a power supply problem. See comments here:

http://www.howtomendit.com/answers.php?id=303877

http://www.amazon.co.uk/TVonics-DTR-Z250-replacement-supply-adaptor/dp/B008RCBJCQ

Surprised you didn't come across comments like that already. You DID try a search for solutions yourself, didn't you?

XXX, April 2016