Has anyone else had a problem with the TV settings on the DSM-510? I set it for digital output and it works fine, then when I turn it off and back on again the setting has changed to analog. The same thing happens when I set it to analog, turn it off and back on again and it's changed to digital.

Any ideas?

what version of firmware do you have installed on your 510?

I will suggest you to go version 1.7 at least. Latest is 1.8

Hope this helps