Whilst trying to copy from

Question

whilst trying to copy from HDD to DVD on my Pan dmrex85eb got error 88 message saying unable to complete copying because of DVD problem. As a result I cannot now copy or playback any DVD. Keep getting message saying 'insert valid disc etc'. When starting up the machine is obvioulsy searching for a DVD (which is not there). Even when machine is off (i.e.time of day only) the DVD symbol is still showing in the display window. Have tried unplugging from the mains for 30 mins and still the same problem. The machine is abut 12 months old. Can anyone assist?Thanks Stephen