hp laserjet m234dwe keeps saying 'cartridge problem' or 'use original hp' but the cartridge is genuine. help?

Diagnosis

This error on the HP LaserJet Pro MFP M234dwe is typically caused by a failure in the "handshake" between the cartridge's chip and the printer's firmware. Even with genuine HP cartridges, the printer may trigger a "Cartridge Problem" or "Use Original HP" alert if the chip contacts are contaminated, if the firmware has updated to a version that enforces a stricter "Cartridge Policy," or if the cartridge was improperly seated during installation. Specifically, the M234dwe is an "e" series printer, meaning it is designed for HP+ services. These models use a cloud-based verification system to ensure the cartridge is authentic and compatible with the specific region of the printer. If the printer loses a stable connection to the HP servers or if the Cartridge Policy setting is set to "Strict," it will reject the toner even if it is a genuine HP 136A or 136X unit. You can confirm this by checking if the error persists after a full power cycle; if it does, the issue is likely a software-level block or a physical contact failure.

How to Fix It

To resolve the "Cartridge Problem" error and bypass the restrictive policy settings, you must access the Embedded Web Server (EWS) to modify the system settings.

1. Find the printer's IP address by printing a Network Configuration Page or checking the HP Smart app.
2. Open a web browser on a computer connected to the same Wi-Fi network and type the IP address into the address bar.
3. If prompted for a PIN, open the cartridge access door and locate the PIN printed on the label inside the chassis.
4. Navigate to the System tab in the top navigation menu.
5. On the left-hand sidebar, select Supply Settings.
6. Locate the Cartridge Policy dropdown menu. Change the setting from "Strict" or "HP Only" to "Allow All" or "Default."
7. Click Apply at the bottom of the page to save the changes.
8. Power off the printer using the power button, unplug the power cord from the wall for 60 seconds, and then plug it back in and restart.

If That Didn't Work

• Clean the Chip Contacts: Remove the toner cartridge and locate the small gold-plated chip on the cartridge. Use a lint-free cloth lightly dampened with 90% isopropyl alcohol to wipe the chip. Simultaneously, use a dry cotton swab to gently clean the corresponding spring-loaded pins inside the printer. Dust or toner leakage on these contacts often prevents the printer from reading the "Genuine" signature.
• Hard Reset the Firmware: While the printer is on, unplug the power cord from the back of the unit. Wait 30 seconds. Plug the cord back in and immediately press and hold the "Resume/Cancel" button (the button with the X or the arrow) for 10 seconds. This forces the printer to re-poll the cartridge chip and can clear "ghost" errors.
• Update Firmware via HP Smart: If the "Use Original" error is due to a known bug in an older firmware version, use the HP Smart app on your mobile device. Go to Printer Settings > Advanced Settings and check for a firmware update. Ensure the printer is connected to a 2.4GHz network for the most stable update process.
• Reseat the Cartridge: Remove the cartridge and shake it horizontally 5-6 times to redistribute the powder. Reinsert it, ensuring it "clicks" firmly into place. If the cartridge is slightly skewed, the chip won't make full contact, triggering the "Cartridge Problem" message.

Heads Up

• HP+ Commitment: Because this is an "e" model, enabling HP+ (during initial setup) permanently locks the printer to genuine HP toner. If you opted into HP+, you cannot use third-party or refilled cartridges regardless of the EWS settings.
• Avoid "Cheap" Genuines: Be wary of "Genuine" cartridges bought from unauthorized third-party marketplaces; these are often refilled shells with fake chips that will trigger the "Use Original" error.
• Power Stability: Always use a surge protector. Power spikes can occasionally corrupt the NVRAM where cartridge data is stored, leading to persistent "Cartridge Problem" errors.
• Storage Tips: Store spare cartridges in a cool, dry place. Extreme humidity can oxidize the chip contacts, leading to communication failures upon installation.