my hp laserjet pro m234dwe won't connect to wifi no matter what i try, any ideas?

Diagnosis

The connectivity failure in the HP LaserJet Pro MFP M234dwe is typically caused by a "handshake timeout" or a frequency mismatch between the printer's wireless card and the router. Because this model is designed for the HP+ ecosystem, it relies heavily on a persistent cloud connection. If the printer has cached an old IP address or is attempting to connect to a 5GHz band (which the M234dwe cannot support), the wireless radio will enter a loop of failed authentication, often manifesting as a blinking blue wireless light that never turns solid.

Another common culprit is the "WPA3" security protocol found on newer Wi-Fi 6 routers. The M234dwe often struggles with WPA3-only environments and requires a transition to WPA2/WPA3 mixed mode to establish the initial handshake. To confirm the issue is network-related rather than hardware failure, check the printer's control panel; if the Wireless light is blinking but the HP Smart app reports "Printer Offline" despite being on the same network, the printer is likely stuck in a state where it sees the SSID but cannot negotiate the security key.

How to Fix It

To resolve this, you must perform a hard network reset to clear the NVRAM and force the device back into "Setup Mode." Follow these exact steps:

1. Power on the printer and wait for it to reach the home screen.
2. Press and hold the Information (i) button for exactly 5 seconds. This will print an Information Page; ignore the page, but this action wakes the system's configuration state.
3. While the printer is idle, press and hold the Wireless button and the Cancel (X) button simultaneously for 5 seconds.
4. Release both buttons. The printer will restart. Wait for the Wireless light to blink blue—this indicates the printer is now in Setup Mode (available for 2 hours).
5. Open the HP Smart App on a mobile device. Ensure your phone is connected to the 2.4GHz band of your Wi-Fi.
6. Click the "+" (Add Printer) icon. The app should now detect the M234dwe in setup mode.
7. When prompted, enter your Wi-Fi password carefully. If the app asks for "Printer Setup" permissions, grant all access to ensure the cloud registration completes.
8. Wait for the Wireless light to turn solid blue, indicating a successful handshake.

If That Didn't Work

• Disable 5GHz Band Temporarily: Log into your router's admin panel (usually 192.168.1.1 or 192.168.0.1). Temporarily disable the 5GHz band or create a separate 2.4GHz Guest Network with a simple SSID (no special characters). Connect the printer to this 2.4GHz network first, then re-enable your 5GHz band.
• Change Security Mode to WPA2: If your router is set to "WPA3 Only," the M234dwe will fail to connect. Change the wireless security setting to "WPA2-AES" or "WPA2/WPA3 Mixed Mode." This is the most frequent fix for modern mesh systems like Eero or Google Nest Wi-Fi.
• Assign a Static IP: If the printer connects but frequently drops, use the HP Smart app to find the printer's current IP address. Go to your router settings and "Reserve" that IP address for the printer's MAC address. This prevents the router from assigning a new IP that the printer cannot track.
• Bypass the App via Web Interface: If the HP Smart app fails, type the printer's temporary IP address (found on the Information Page) into a web browser. This opens the Embedded Web Server (EWS). Navigate to the "Network" tab and manually enter your SSID and Password.

Heads Up

• HP+ Requirement: Since this is the "e" series model, the printer requires an active internet connection to function. If you lose Wi-Fi, the printer may enter a "locked" state where it refuses to print even via USB until the cloud connection is restored.
• Avoid USB Setup: Do not attempt to set up the wireless connection via a USB cable; this often confuses the driver installation and can lead to "Driver Unavailable" errors in Windows.
• Power Cycle Sequence: If the connection drops, always reboot the router first, wait 2 minutes, and then restart the printer. This forces a fresh DHCP request.
• Firmware Updates: Once connected, allow the printer to run any pending firmware updates. HP frequently releases patches for the M234 series specifically to improve Wi-Fi stability with newer routers.