hp m234dwe printer says it's connected but won't print from my phone

Diagnosis

When the HP LaserJet Pro MFP M234dwe reports a "Connected" status on its control panel but refuses to print from a mobile device, the issue is rarely a total loss of network connectivity. Instead, it is typically a "handshake" failure between the mobile device and the printer's internal network interface. This occurs because the printer has successfully associated with the router (Layer 2 connectivity), but the application layer (Layer 7) is being blocked or misrouted. This is often caused by the printer being assigned a dynamic IP address that has shifted, leaving the HP Smart app attempting to send data to a "ghost" IP address that no longer exists.

Another common root cause is the "HP+" cloud requirement inherent to the 'e' series models (like the M234dwe). These printers require a constant, authenticated heartbeat to the HP Cloud servers. If the printer is connected to the Wi-Fi but the account authentication has lapsed or the printer is stuck in a "pending" registration state, the HP Smart app will show the printer as online (because it sees it on the local network) but will reject print jobs because the cloud-based permission token is missing. You can confirm this by attempting to print a "Network Configuration Page" from the printer's onboard menu; if the IP address is 169.254.x.x, the printer is not actually on your network despite what the screen says.

How to Fix It

1. Perform a "Power Cycle Reset": Turn off the printer using the power button, then physically unplug the power cord from the wall outlet. Restart your mobile device and your wireless router. Wait 60 seconds before plugging the printer back in. This forces the router to assign a fresh DHCP lease to the printer.
2. Open the HP Smart App on your phone. If the printer shows as "Offline" or "Unable to Print," tap the printer icon and select "Forget this Printer" or "Remove Printer" to clear the cached network credentials.
3. Navigate to the printer's control panel. Press the Menu button, go to "Network," and select "Restore Network Defaults." This wipes any conflicting IP assignments.
4. Return to the HP Smart App. Tap the "Plus (+)" icon to add a new printer. Ensure your phone is connected to the 2.4GHz band of your Wi-Fi, as the M234dwe can struggle with 5GHz steering.
5. Follow the on-screen prompts to re-link the printer. When prompted, ensure you sign into the HP account associated with the original setup. If the app asks to "Finish Setup," complete the process until the "Printer Ready" message appears.
6. Send a test page from the app to verify the communication path is open.

If That Didn't Work

• Disable Mobile VPNs and Ad-Blockers: Apps like NordVPN, ExpressVPN, or system-wide ad-blockers (like AdGuard) create a secure tunnel that hides your phone from local network devices. Disable these entirely in your phone's settings, then restart the HP Smart app. The app cannot "see" the printer's local IP if the VPN is routing traffic through a remote server.
• Assign a Static IP Address: Access the printer's Embedded Web Server (EWS) by typing the printer's IP address into a web browser on a computer. Go to the "Network" tab, select "IPv4 Config," and change the IP assignment from "Automatic/DHCP" to "Manual/Static." This prevents the "ghost IP" issue from recurring when the router reboots.
• Toggle "Private Address" on iOS/Android: On iPhones, go to Settings > Wi-Fi > [Your Network] and toggle off "Private Wi-Fi Address." Some routers see this rotating MAC address as a security threat and block the printer's ability to communicate with the phone.
• Check for Firmware Updates: Within the HP Smart app, select "Printer Settings" and then "Firmware Update." The M234dwe frequently receives updates that patch specific communication bugs between the printer's wireless chip and newer versions of iOS and Android.

Heads Up

• HP+ Requirement: Because this is an "e" model, it will permanently disable printing if the printer is disconnected from the internet for an extended period or if the HP account is deleted.
• Frequency Band: If you have a "Smart" router that combines 2.4GHz and 5GHz into one name (SSID), the printer may intermittently drop. Creating a dedicated 2.4GHz guest network for the printer is the most stable long-term solution.
• Paper Sensor: Ensure the paper tray is clicked fully into place. Sometimes the "Unable to Print" error on the phone is actually a "Paper Jam" or "Out of Paper" error on the printer that the app fails to translate correctly.