Had a 435XDE for few days now and am very please with it. However I have noticed that it has turned itself to standby a couple of times whilst it's been on Sky. I wasn't really watching it - it was just on in the background. I know there is a 'No Signal Off' power save mode but don't think it should turn off when watching Sky. My girlfriend said it came up with a message the bottom corner but didn't get time to read it. It turns back on fine when you turn it on with the remote. Any Ideas? Thanks Wolvy.