How to reset maintenance kit for HP printer 600m 602

1. Press the Home button on the printer's control panel.
2. Open the "Administration" menu.
3. Select "Manage Supplies".
4. Select "Reset Supplies".
5. Select "New Maintenance Kit".
6. Select "Yes" to reset the maintenance kit counter.

POwer off the printer and then depress the Maintenance button now Power On the printer till it resets which is for few seconds

HP LaserJet 4350 Reset the maintenance count instructions

Hi
first you have to check the physical stage of the fuser is this good or damaged.
if damaged replace it with a new one.
second you have to perform a reset of the maintenance kit with the following step:
1. in main panel will the option of the Administrator;
2. click Administrator and go with the down arrow until Reset option;
3. Reset In going with the down arrow until Reset Supplies
4. Choose New Maintenance Kit option and confirm with OK

1. Power off the printer.
2. Power on the printer while depressing both the Go and Cancelbuttons. Keep the buttons depressed. The lights will begin to flash in sequence.
3. Release the buttons when all three lights begin to flash in unison

Reset the maintenance-kit counter
1. Turn the product power off and then on.
2. When XXX MB appears on the control-panel display, press and hold down the OK button until all three control-panel lights flash once, and then stay on. This might take up to 10 seconds.
3. Release the OK button and press the up arrow to scroll to NEW MAINTENANCE KIT.
4. Press OK to reset the maintenance-kit counter.

This maintenance kit consists of a fuser, pick up rollers, transfer rollers. On this model you can also reset the maintenance count by entering the service mode and sometimes by scrolling down to the config menu until you see resets.

After you install the maintenance kit, power cycle the printer.
As soon as it starts counting memory, press and hold the OK button until all three control-panel lights flash once and then stay on solid.
Release the OK button and press the up arrow to scroll to NEW MAINTENANCE KIT.
Press OK to reset the counter

Reset the maintenance-kit counter 1. Turn the product power off and then on. 2. When XXX MB appears on the control-panel display, press and hold down the OK button until all three control-panel lights flash once, and then stay on. This might take up to 10 seconds. 3. Release the OK button and press the up arrow to scroll to NEW MAINTENANCE KIT. 4. Press OK to reset the maintenance-kit counter.

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.