HP Error Code 1684

Error 1684 indicates that one or more ink cartridges installed in your HP printer are not recognized or are deemed incompatible.

1. 1

   Turn off your HP printer and unplug it from the power source for about 60 seconds. Plug it back in and turn it on to perform a hard reset.

2. 2

   Open the printer's cartridge access door and carefully remove all ink cartridges. Inspect each cartridge for any protective tape or plastic clips that might still be attached and remove them.

3. 3

   Gently wipe the copper-colored electrical contacts on both the cartridge and inside the printer's carriage with a lint-free cloth lightly dampened with distilled water. Ensure they are dry before proceeding.

4. 4

   Reinsert each cartridge firmly into its correct slot until it clicks into place. Make sure they are seated properly and not loose.

5. 5

   If the error persists, try removing only the cartridge indicated by the error (if specified) and reinserting it. If not specified, try replacing one cartridge at a time with a new, genuine HP cartridge to identify the faulty one.

6. 6

   Update your printer's firmware. Visit the HP support website, find your printer model, and download the latest firmware update utility. Follow the instructions provided.

7. 7

   If you are using non-genuine or refilled cartridges, try replacing them with new, genuine HP cartridges. Sometimes, the printer's firmware updates can specifically target and block non-OEM cartridges.

8. 8

   Perform a printer alignment or cleaning cycle through your printer's control panel or software, as sometimes this can help reset cartridge recognition.

9. 9

   Check for any obstructions or debris inside the cartridge carriage area that might be preventing proper contact or movement.

You should consider calling a specialist if, after trying all the DIY steps, the error 1684 persists, especially if you've already tried replacing the suspect cartridge with a new, genuine HP one. If the printer continues to reject cartridges even after cleaning contacts and updating firmware, it might indicate a deeper hardware issue such as a faulty printhead assembly, a problem with the cartridge detection sensors, or a malfunctioning main logic board. These issues typically require professional diagnosis and repair.