Quick Summary
Error code NW-31456-9 on PlayStation typically indicates an issue with the network connection between your PlayStation console and the PlayStation Network (PSN) servers. This can be caused by various factors affecting your internet connection or the PSN service itself.
Common Causes
- PlayStation Network (PSN) Downtime: PSN might be undergoing maintenance or experiencing outages, preventing your PlayStation from connecting.
- Internet Connection Issues: Problems with your home network, such as a weak Wi-Fi signal, router issues, or problems with your internet service provider (ISP), can cause this error.
- Incorrect Network Settings: Incorrect or outdated network settings on your PlayStation can prevent it from connecting to the internet and PSN.
- Router or Modem Problems: Your router or modem may be malfunctioning or require a restart, leading to connectivity issues.
- Firewall or Security Software Interference: Firewall settings or security software on your network might be blocking the connection to PSN.
Step-by-Step Fixes
Method 1: Check PlayStation Network (PSN) Status
Step 1: Visit the official PlayStation Network Service Status page (status.playstation.com) using a computer or mobile device.
Step 2: Check for any reported outages or maintenance. If PSN is down, wait until the service is restored before attempting to connect again.
Method 2: Restart Your PlayStation Console
Step 1: Completely turn off your PlayStation console.
Step 2: Wait for about 30 seconds.
Step 3: Turn your PlayStation console back on and try connecting to PSN again.
Method 3: Restart Your Network Devices
Step 1: Turn off your PlayStation console, modem, and router.
Step 2: Wait for about 1-2 minutes.
Step 3: Turn on your modem and wait for it to establish a connection.
Step 4: Turn on your router and wait for it to establish a connection.
Step 5: Turn on your PlayStation console and try connecting to PSN again.
Method 4: Test Your Internet Connection on PlayStation
Step 1: On your PlayStation, go to Settings -> Network -> Test Internet Connection.
Step 2: Follow the on-screen instructions to test your internet connection.
Step 3: Review the test results and note any errors reported. This can help identify if the issue is with your internet connection or PSN.
Method 5: Check and Configure Network Settings
Step 1: On your PlayStation, go to Settings -> Network -> Set Up Internet Connection.
Step 2: Choose either Wi-Fi or LAN cable depending on your connection method.
Step 3: Select 'Custom' for the setup method.
Step 4: Configure your IP Address Setting to 'Automatic'.
Step 5: Configure your DHCP Host Name to 'Do Not Specify'.
Step 6: Configure your DNS Settings to 'Manual'.
Step 7: Set the Primary DNS to 8.8.8.8 and the Secondary DNS to 8.8.4.4 (Google's public DNS servers).
Step 8: Configure your MTU Setting to 'Automatic'.
Step 9: Configure your Proxy Server to 'Do Not Use'.
Step 10: Test your internet connection again after making these changes.
Method 6: Update Router Firmware
Step 1: Access your router's configuration page through a web browser (usually by typing 192.168.1.1 or 192.168.0.1 in the address bar).
Step 2: Log in to your router using the username and password (check your router's manual or the manufacturer's website for the default credentials).
Step 3: Look for a 'Firmware Update' or 'Router Upgrade' option (the location varies depending on the router model).
Step 4: Follow the instructions to download and install the latest firmware version for your router.
Step 5: Restart your router after the firmware update is complete.
Method 7: Disable Media Server Connection
Step 1: On your PlayStation, go to Settings -> Network -> Media Server Connection.
Step 2: Set Media Server Connection to 'Disable'.
Step 3: Restart your PlayStation console.
Method 8: Contact Your Internet Service Provider (ISP)
Step 1: If you have tried all the above steps and are still experiencing the error, contact your ISP to inquire about any network issues in your area or any restrictions on your internet connection.