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Resetting ink levels in HP printers in  HP 15, 17, 23, 41, 45 and 78 cartridges

  1. Pull your cartridge or cartridges out of the printer and face them as shown. Note: You can reset just one cartridge, or both at the same time with this procedure.
  2. Place a piece of tape so that it just covers the top 4 contacts on the top left side of the contact area as shown.
  3. Reinsert the cartridges into the printer with the tape in place.
  4. Close the lid and wait about 5 seconds.
  5. Open the lid and wait for the printer to give the cartridges back to you. Note: The printer may take time to do this, and may flash to show there is an error with your cartridges. This is normal.
  6. Remove the cartridges again and move the tape to the other side as shown in the lower pictures.
  7. Reinsert the cartridges into the printer with the tape in place.
  8. Close the lid and wait about 5 seconds.
  9. Open the lid and wait for the printer to give the cartridges back to you. Note: The printer may flash to show there is an error with your cartridges again. This is normal.
  10. Remove the cartridges and remove all the tape. Be sure the contacts are clean.
  11. Place the cartridges back into the printer. They should now read 100% full. If not, redo the procedure, but only cover the top 3 contacts. If they still do not show as full, repeat, but only cover the top 2 contacts.

Three Cartridge Method

On some models the above procedure won't work, and you'll have to fool the printer by keeping three cartridges on hand (these cartridges can be old, empty cartridges).  This works because the printer only remembers the last TWO cartridges which were in it.  The procedure is as follows:

  • Cart #1 (empty) is removed for refilling
  • Cart #2 is installed
  • Cart #2 is removed
  • Cart #3 is installed
  • Cart #3 is removed
  • Cart #1 (refilled) is installed.  The printer now thinks that the filled cart is new.

 





 
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