Error code 76 on hp m2727. auto shutdown on powercycle or will cycle with none of the keys functioning... locked up keypad

SOURCE: HP M2727 goes into low power sleep mode and can

You may need to have your printer's firmware updated by a certified technician.

SOURCE: Hp M2727 goes into low power sleep mode and can

This is a problem with the formatter board, try doing an nv ram ( turn off the printer and hold down the right arrow and the cancel button, turn the printer back on and continue holding until you see permanent storage init). If this doesn't work call hp tech support 1800 334 5144 and ask for a case number. This printer has a service note which will cover the formatter for 2 years. Al