I got a DTI6300-16 from my dad who no longer wanted it. Set it all up and it all seemed to work fine. I left it in standby for a while - a couple of weeks (!) as I have SKY plus and was going to sell it. When I tried it again, it all works fine UNTIL I plug an aerial in!! As soon as I plug the aerial in, the whole thing locks up and then start a cycle of rebooting every few minutes. If I disconnect the aerial then it turns on fine and stays on. I can even play recorded programs OK as well. I've also noticed that when I switch it on with the aerial connected, and the menu selected, it's fine until the date and time appear in the menu bar. As soon as these appear the box locks up! Any ideas please? Is there a factory default option I can try?