hp m234dwe wireless light is just blinking blue constantly, what does that mean?

Diagnosis

A blinking blue wireless LED on the HP LaserJet Pro MFP M234dwe indicates that the printer is in "Setup Mode." Specifically, the printer is broadcasting its own temporary internal Wi-Fi signal (SSID) to allow a mobile device or computer to communicate with it and pass along the home network credentials. This happens when the printer has lost its previous connection, has been factory reset, or was never successfully joined to a network after being unboxed.

If the light continues to blink indefinitely even after you believe you have connected it, the printer is stuck in a handshake loop. This occurs when the printer attempts to authenticate with the router but fails due to a frequency mismatch (trying to connect to 5GHz when it requires 2.4GHz) or a security protocol conflict (WPA3 vs WPA2). To confirm the printer is actually in setup mode, check your phone's Wi-Fi list; you should see a network named "HP-Setup-M234-LaserJet." If that network is absent, the blinking light may actually indicate a critical network error rather than a setup state.

How to Fix It

To resolve the blinking blue light and establish a stable wireless connection, follow these precise steps:

1. Reset Network Settings: Press and hold the Wireless button and the Cancel (X) button simultaneously for five seconds. This clears any stale IP addresses or corrupted network profiles. The wireless light will flash rapidly and then return to a steady blink.
2. Prepare the Mobile Device: Ensure your smartphone is connected to the 2.4GHz band of your router. Many modern routers use "Smart Steering" which merges 2.4GHz and 5GHz; if the printer fails to connect, temporarily disable 5GHz in your router settings.
3. Execute HP Smart Setup: Open the HP Smart app. Tap the "Add Printer" or the plus (+) icon in the top right corner. The app will scan for devices in setup mode. Select the M234dwe from the list.
4. Credential Entry: When prompted, enter your Wi-Fi password exactly. The app will now push these credentials to the printer. The blue light will blink rapidly during the transfer and then turn solid blue once the connection is verified.
5. Finalize Connection: Once the light is solid, print a Network Configuration Page by pressing the Information (i) button to confirm the printer has been assigned a valid local IP address (e.g., 192.168.1.XX).

If That Didn't Work

• WPS Push Button Method: If the app fails, use the Wi-Fi Protected Setup (WPS) method. Press and hold the Wireless button on the printer for exactly 3 seconds until the light blinks. Within two minutes, press and hold the WPS button on your router for 3-5 seconds. The printer and router will perform a hardware handshake, and the blue light will turn solid.
• Direct IP Connection: If you have a laptop, connect to the "HP-Setup" Wi-Fi network directly. Open a web browser and type 192.168.223.1 into the address bar. This opens the Embedded Web Server (EWS). Navigate to the "Network" tab, select "Wireless," and manually enter your SSID and password.
• Power Cycle Sequence: Perform a hard reset of the network chain. Turn off the printer and unplug your router. Wait 30 seconds. Plug the router back in and wait for the internet to fully restore. Only then power on the printer. This often clears "IP conflicts" where the router refuses to assign an address to the printer.
• Disable VPNs: If using the HP Smart app, disable any active VPNs or Ad-Blockers (like Pi-hole) on your phone. VPNs mask your device's local IP, making it impossible for the app to "see" the printer on the local subnet during the setup phase.

Heads Up

• HP+ Requirement: The "e" in M234dwe signifies this is an HP+ enabled model. These printers require a constant internet connection and an active HP account to function. If the blue light is blinking and you are offline, the printer may lock itself and refuse to print until the connection is restored.
• Avoid 5GHz: This model is strictly compatible with 2.4GHz networks. If your router is set to "5GHz Only," the blue light will never stop blinking because the printer cannot physically see the network.
• Firmware Updates: Once the blue light turns solid, immediately check for firmware updates in the HP Smart app. Outdated firmware often causes the printer to drop the connection, triggering the blinking blue light again after a few days.
• Static IP Assignment: To prevent the blinking light from returning in the future, use the EWS (192.168.223.1) to assign a Static IP address to the printer so it doesn't lose its place when the router reboots.