Hello there HP Supportboard,
let's get straight to the facts.
So, as the title says, I got an HP M276N connected to my router with wirless lan and was curious if the printer recived an firmwareupdate since I bought it. And yes, there was a firmware update. So I cheerfully updated my Printer without knowing what will happen. The only thing it broke was that the printer has now to turn off after MAX. 1Hr because of EcoSmart!
I know you might say, but it'll wake up when you send something - well, I bought it because of the AirPrint feature.
Before the Firmwareupdate there was no problem with that, just print whenever you like via AirPrint.
Now I have either to print something or scan something in order to give the Printer a "wake up call" or turn it off and on again...
So it's either firmware rollback (if possible) or HP fixes that (or atleast tells me how to fix it. ;)
Until then,
Paul