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Connection lost (device <--> control panel) after firmware update

HP LaserJet 700 color MFP M775



I have updated firmware on machine HP LJ 700 MFP M775 to version via embeded website. When the process was done i followed instruction and restart machines. Now I have only error message on control panel: connection lost (device <--> control panel). I have already tried to disconnect and connect again the control panel as suggested in another topic but it didn't help.


Do you know what I can now? What next?




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