I tried resetting it but still no cigar... Not sure I want to risk flashing the firmware backwards after reading someone bricked 2 of them flashing backwards, I have already had it freeze on me twice when messing about with it, but luckily unplugging power lead reset / fixed it both times. Think I will leave it alone as I like it too much to break it and have to go through RMA
Must say though that after a couple of months using the D1050 I still think it is an awesome headphone amp and DAC, best quality I have heard... Only thing I would change is that the headphone jack mutes the RCA out so it is a bit inconvenient... But I don't think there are any dac/amps that you can switch between headphones and RCA via remote / button.
The treble on the D1050 is so nice... It is not dull or boring but at the same time seems like it has a little troll in the DAC which eats all the sibilance and other treble nasties leaving you with a completely pristine and natural sounding treble.