You can reset the toner cartridge count in the service menu. Full details on how to do this can be found on my website here.

Hi,
Sometimes on this machine as there is a lot of loose toner around it can cover over the sensors in the machine, what I would advise is to remove all the toner cartridges and check for the copper contacts on both the machine and under the imagining unit (which the toner is placed in). Once you have cleaned that away slowly close the lid and reboot the machine and it should return to normal. Its just toner getting caught up in the sensors. Follow the instructions below, when you remove the unit, lift it over your head to find the copper contacts and clean them, be careful not to spill toner everywhere. Good luck!

Reseating the imaging unit

Remove the toner cartridge:

1. Open the top cover.
   
   The imaging units are sensitive to light. Do not expose the imaging units to light any longer than necessary to remove it and cover it. Failure to follow these instructions may damage the imaging units.
   
2. Identify the color of the toner cartridge to be replaced (Cyan, Magexerox phaser 7300 toner cartridge problems - identifycolor176x179.gif
   
   
3. Move the orxerox phaser 7300 toner cartridge problems - moveleverright204x202.gifartridge to the right so that it unlocks.
   
   
   
4. Set the toner cartridge on paper to avoid any toner spilling.
   
   Reseat the imaging unit:
   
5. Lift the imaging unit xerox phaser 7300 toner cartridge problems - lineuppins210x267.gife printer.
   
   
6. Line up the guide pins with the printer's frame and lower the imaging unit back into the pxerox phaser 7300 toner cartridge problems - installtonercart284x241.gif"/uploads/images/lineuppins210x267.gif" alt="lineuppins210x267.gif" />
   Reinstall the toner cartridge: Move the orange lever on the toner cartridge to the left so it locks.
   
   
7. Clean the LEDs with the supplied wipe.
   
   
8. Close the top cover.