We have a new Laserjet 400 MFP M425dn network printer that will not wake up after idle time. It shows as offline to the end users. The only way to wake it up is to power cycle the printer. Until it is power cycled the printer cannot be pinged.
We have updated to the latest firmware. We have set the Shut Down After to Never. We have set the Sleep/Auto Off After to the maximum of 1 Hour. None of this has helped.
I have seen NUMEROUS discussions of this problem, but have not found any solutions.