Digihome DTR80 Freeview Hard Drive Recorder = No Display?

I've had the above unit for about 2 year now with no problems, but suddenly after a 6 month storage period, the units display is non functional. Upon initial internal inspection there are no internal fuses so no 'blown fuse' issues and there is no circuit board component damage or burnt components. The units hard drive still spins and there is power going in but I'm at a loss to see what is wrong. I've checked all internal interconnections for fitting still so if anyone has come across this fault condition before could you help me please? Many Thanks. Keiron