keep getting 'cartridge problem' error on screen even with brand new hp ink.

Diagnosis

The "Cartridge Problem" error on the HP ENVY Inspire 7955e is typically caused by a failure in the electrical handshake between the cartridge's copper contact pads and the printer's carriage pins. Even with brand new genuine HP ink, microscopic residues—such as leaked ink, oxidation, or manufacturing oils—can create a thin insulating layer. This prevents the printer from reading the chip's unique ID, leading the firmware to believe the cartridge is missing, incompatible, or damaged. In some cases, this is not a physical blockage but a "logic lock" where the printer's volatile memory retains an error state from a previous failed cartridge. If the printer doesn't detect a clean voltage return from the chip during the initial boot-up sequence, it will trigger this persistent error message regardless of whether the cartridge has been replaced. You can confirm this by checking if the error persists after a hard power reset; if it does, the issue is almost certainly physical contamination on the contact points.

How to Fix It

To resolve this, you must perform a deep clean of the electrical interface and a hard power cycle to clear the internal cache.

1. Power on the printer and open the front access door. Wait for the ink carriage to slide to the center replacement position.
2. Once the carriage is centered, pull the power cord directly from the back of the printer while it is still on. This is critical to ensure the carriage stays unlocked for access.
3. Press the eject button on each ink cartridge and remove them carefully.
4. Locate the copper-colored contact pads on the back of the cartridges. Use a lint-free microfiber cloth or a high-quality cotton swab dampened with 90% isopropyl alcohol or distilled water. Do not use rubbing alcohol with additives or soap.
5. Gently wipe the copper pads on the cartridges in a circular motion to remove oxidation.
6. Look inside the carriage where the cartridges sit. Locate the gold pins that make contact with the cartridges. Carefully wipe these pins, ensuring you do not bend them.
7. Allow the contacts to air dry for at least 5 minutes. Any moisture trapped in the pins can cause a short circuit when powered back on.
8. Reinstall the cartridges, ensuring they "click" firmly into place. If they are loose, the pins won't make a full connection.
9. Close the door and plug the power cord back into the wall outlet and the printer.

If That Didn't Work

• Perform a Hard Power Reset: While the printer is on, unplug the power cord from the back. Unplug the cord from the wall outlet. Wait exactly 60 seconds. Plug the cord back into the wall first, then back into the printer. This forces the printer to re-poll the hardware and can clear "ghost" cartridge errors.
• Update the Firmware: If the printer is connected to Wi-Fi, check for updates via the HP Smart App. HP frequently releases firmware patches to resolve "Cartridge Problem" errors caused by chip compatibility issues with newer batches of ink.
• Test Individual Cartridges: Remove all cartridges except for one (e.g., just the Black). If the error disappears, the issue is specifically with the other cartridge. If the error persists with only one installed, the problem may be the carriage pins themselves.
• Check for Protective Tape: Double-check that the orange plastic pull-tab and the clear plastic protective tape have been completely removed from the bottom of the new cartridges. A tiny sliver of remaining adhesive can block the electrical connection.

Heads Up

• Avoid using paper towels to clean the contacts; they are abrasive and can scratch the delicate gold plating, leading to permanent connection failures.
• Never touch the copper contact pads with your bare fingers, as skin oils can leave a residue that interferes with the electrical signal.
• If you are using "Instant Ink" cartridges, be aware that they have a built-in expiration date; if the ink is too old, the chip will trigger a "Cartridge Problem" error even if the ink levels are full.
• Ensure the printer is on a level surface. An uneven tilt can occasionally cause the carriage to sit slightly off-center, preventing a flush connection between the pins and the ink chips.