HP LASER 107w

1. Open the top cover.
   
2. Grasp the handle on the toner cartridge, and then pull the toner cartridge out to remove it.
   
3. Remove the new toner cartridge from its package, and then discard or recycle the packing materials.
   
4. Grasp both sides of the toner cartridge, and then distribute the toner by gently rocking the toner cartridge back and forth.
   
5. Align the new toner cartridge with the tracks inside the printer, and then push the toner cartridge until it is firmly seated.
   
6. Close the top cover.
   

Reference/s: https://support.hp.com/ph-en/document/c06219892