i doubt its a software problem as you would have the latest version already and there hasnt been an update for ages.the only thing i can suggest is a full system reset.Unplug box from the mains. Press and hold the two buttons either side of the select button, then plug back in while
holding the two buttons in, wait until the lights on the front of the box begin to spin backwards, then press the select button on the box, the record light will come on. The box will then perform the reset, and will go back into standby when finished. This procedure will wipe off all your recordings, but may just help to get your box working again.