Have trouble with mine of a different kind,it keeps losing either the vision or the sound for no reason,or the remote wont work ,ie it stays frozen on one channel,I have found you have to disconnect it from the power supply(the PSU is separate in mine) power it down altogether, ie pull the mains plug then plug it back in switch it on and do a first time installation if it has that option available.
They all ask if you want to scan for updated software but it generaly happens about 2 am,so its only us insomniacs that see that message.
