I have tried several times to get my HR24-100 do force a software and no luck. As soon as I reset the receiver I see the Hello screen and I start hitting 0 2 4 6 8 and it does not go to the download. The hello screen comes and goes to quick. Is the 0x4a7 the latest software?
It might be that your TV is sensing the signal going away when you do the reset and it is trying to switch modes. By the time it comes back the Hello screen is already almost done. Try starting the (0 2 4 6 8) 5 seconds after you release the reset button, whether there is a picture or not.
It's too late to get this week's CE (not that it was anything special), but the latest national release is 0x4a7. This week's CE is 0x4c4. You CAN practice your forcing timing on the national release, because the forced download always works regardless of if the latest release is installed or not.