Mine has been acting up lately. Sometimes I would get picture but no sound. Then this week it went to black screen: no picture or sound on any channels. So I thought I would turn it off for a day.
After that, when I looked at the actual unit I couldn't get it to turn on. No blue light at all. Tried unplugging it etc and still nothing. Then I wiggled the power cord connection at the back and finally it came back to life with both pic and sound. Maybe the power cord thing was cooincidental but to answer your question: "yes I have been having problems this week trying to get it to turn on". I did all of this only yesterday so who knows how long it will last.
Mine is rebooting everytime I power it on. Called Bell tonight as this takes between 3-5min each time... There answer to me was to not turn it off as this was a "new feature of the latest software" to which I argued with him that it was not a solution but from what he is saying is that the 6100's when powered off now need to re-sync with the sat. Out of the 6-7 people I know with the 6100's I am the only one with this issue and it drives me nuts. I power it on, get a black screen, the receiver reboots then finds the sat and downloads the guide. I have also had the receiver re-boot while watching a show a few times... But Bell seems to think this is normal