Fix Fault Hitachi

my Hitachi tv recorder model HDR 255 has started switching itself off especially on stand by any sujestions

Recently within last few weeks a black blank screen is appearing briefly when viewing freeview channels.this blank screen lasts for one or two seconds with loss of sound also but returns to normal aga ... more

The blue flashing light comes on and you can hear the hard drive running and the panel displays "starting"but it just keeps cycling on and off and will not go any further.