Hi how to solve reset maintenance kit for hp printer 806dn

SOURCE: Maintenance shedule error

Power off the printer and hold down the two top right buttons and power the printer back up. You will be taken to a menu that you will be able to scroll through. Look for the "Maint Count Reset" option and press the "enter or go" button and reset the count.

SOURCE: New maintenance kit

Hi Did you run up the developer unit? Menu button down to Other then to Service and press enter on developer and switch off and turn on will run for a while. In the service menu after you run up the dev unit you may have a option in there to press enter on the MK Symbol.
Cheers

SOURCE: Reset maintenance counter

To reset the Maintenance counter yiu need to go into Config Mode.
Power on the printer while holding the 2 & the 6 button.
You will see the maintenence counter and can reset it from there.

SOURCE: HP 4345. Need to reset the Maintenance kit error.

To reset the maintenance-kit counter
1 Turn the MFP off and then on.
2 When the memory count appears on the control-panel display, press and hold 6 until all three
LEDs flash once and then stay on. (This might take up to 20 seconds.)
3 Release 6 and then press 3.
4 Press 6 to select NEW MAINTENANCE KIT.
5 The MFP completes its initialization sequence. The maintenance-kit counter is automatically reset.

SOURCE: Need to reset the counter

First, you enter the config menu by powering off the printer. Hold the middle and right arrow buttons and turn the printer back one. Continue to hold until you see Performing self test. Then release. You will then see config menu. Scroll down to reset maintenance count and press select. It will reset and bring you back. Then restart the printer.