I was in the middle of watching a recorded programme tonight and my Sky HD box just switched itself off into standby mode and wouldn't power back on. I've removed the power from the wall, reconnected, waited 5 minutes but it still won't power back on. Tried waiting 10 minutes - still won't boot up. Next I tried pressing <back up> whilst reconnecting the power to force a software download (read this solution on the forum somewhere). I got all the traffic lights on the front but after a while it went back into standby. It's now ssadly still stuck there with a red standby light on, but will not boot back up. Any ideas? Am I going to need an engineer?