brother mfc j1010dw won't connect to wifi, i've tried everything and it just fails

Diagnosis

The Brother MFC-J1010DW frequently fails to connect to Wi-Fi due to a band-steering conflict. Most modern routers use a single SSID for both 2.4GHz and 5GHz frequencies. This printer operates exclusively on the 2.4GHz band; when the router tries to "force" the printer onto the 5GHz band or switches frequencies during the handshake process, the connection drops, resulting in a generic "Connection Failed" or "Unable to obtain IP address" error. Additionally, this model often struggles with WPA3 encryption. If your router is set to "WPA3 Only" or "WPA2/WPA3 Mixed," the printer's wireless card may fail to authenticate the security handshake. You can confirm this is a network issue if other devices in the same room are connected, but the printer fails specifically at the "Connecting" stage of the Setup Wizard despite the correct password being entered.

How to Fix It

To resolve this, you must clear the printer's network cache and force a manual connection to a compatible frequency. Follow these exact steps:

1. Perform a Hard Network Reset: Press the Settings (Wrench/Screwdriver icon) button. Navigate to Network > Network Reset. Select Yes to confirm. The printer will restart; this clears any stale IP assignments or corrupted SSID profiles.
2. Configure Router Banding: Access your router's admin panel via a web browser. Temporarily disable "Smart Connect" or "Band Steering." Create a separate SSID specifically for your 2.4GHz band (e.g., "MyHomeWiFi_2.4"). This ensures the printer does not attempt to jump to the 5GHz frequency.
3. Adjust Security Protocol: In the router settings, ensure the security mode is set to WPA2-PSK (AES). If it is set to WPA3, the MFC-J1010DW will likely fail to connect.
4. Run the Setup Wizard: On the printer control panel, press Settings > Network > WLAN > Setup Wizard.
5. Select the 2.4GHz SSID you created. When prompted for the password, use the arrow keys to select characters. Note that the printer is case-sensitive; ensure you are toggling between uppercase and lowercase correctly using the designated shift key on the LCD.
6. Confirm the connection: Once the screen displays "Connected," press OK. Print a Network Configuration Report (Settings > Network > Network Config) to verify that the IP address is not 0.0.0.0.

If That Didn't Work

• Assign a Static IP Address: Log into your router and find the printer's MAC address (listed on the Network Config report). Assign a "DHCP Reservation" or Static IP to the printer. This prevents the router from changing the printer's address, which often causes the computer to "lose" the printer even when it is connected to Wi-Fi.
• Disable IPv6: Some network environments experience packet collisions between IPv4 and IPv6. Go to Settings > Network > WLAN > IPv6 and switch it to Off. This forces the printer to communicate using the more stable IPv4 protocol.
• Check for Signal Interference: The MFC-J1010DW has a relatively small internal antenna. If the printer is placed inside a metal cabinet or directly next to a microwave or cordless phone base, signal degradation occurs. Move the printer within 10 feet of the router for the initial setup to rule out distance as a factor.
• Update Firmware via USB: If the printer is totally unresponsive to Wi-Fi, connect it to a PC via a USB cable. Download the Brother Firmware Update Tool from the official support site. Outdated firmware often contains bugs related to newer router security handshakes.

Heads Up

• Avoid WPS: While the "Push Button" (WPS) method seems easier, it frequently fails on the MFC-J1010DW due to timeout issues. Always use the Setup Wizard for a more stable connection.
• Sleep Mode Issues: If the printer disappears from your network after a few hours, disable "Deep Sleep" mode in the network settings to keep the wireless card active.
• Password Length: Ensure your Wi-Fi password is between 8 and 63 characters. Extremely long passwords can sometimes cause the printer's buffer to overflow during entry.
• Firewall Blocking: If the printer is connected to Wi-Fi but your PC can't find it, ensure that UDP port 515 and TCP ports 9100 and 5222 are open in your Windows/Mac firewall.