hitachi ax-m79

I have had this item for about 2 months, I un-plugged it and moved it out of my living room on saturday but when I tried to put it back in today I have found that there is no display on the front VDF display lens and none of the front buttons seem to work, I can't open the disk door or anything. When I put my TV on to the AV channel I do get the DVD start up screen but I cant do anything else with it. I have checked my manual for trouble shooting points but can't find this problem in there. I have removed and then plugged back in all the leads and they are in the correct places and I have tried turning the power off and on again. Please can you tell me what else I cant do to rectify this fault as I am at a loss as to what to do next. As far as I am aware the DVD has not been knocked or anything.

Thanking you in anticipation
Rob McLean.