Pi 4 / Pi 400 WiFi Problems

Overview

WiFi issues on Raspberry Pi 4 and Raspberry Pi 400 are challenging to diagnose and troubleshoot. In most cases, WiFi problems are caused by a defective WiFi module on the board.

Diagnosis difficulty

Why WiFi problems are hard to troubleshoot:

Multiple potential causes: Router compatibility, distance, interference, OS configuration, or hardware defect
Intermittent failures: WiFi may work sometimes but not others
Environment-dependent: Problems may only occur in certain locations or with certain networks

Hardware-level WiFi failures (defective module) are the most common cause when basic troubleshooting doesn't help.

Warranty coverage

All Vilros orders come with a 1-year warranty from the original date of purchase.

If your Raspberry Pi 4 or Pi 400 WiFi is not working despite basic troubleshooting, the WiFi module may be defective and covered under warranty.

Contact Vilros support

Please contact us with the following information:

Order number: Your Vilros order number
Purchase date: When you purchased the device
Symptoms: Description of the WiFi problem (cannot detect networks, cannot connect, drops connection, etc.)
Troubleshooting tried: List what you've already tried

Contact information:

Email: support@vilros.com
Phone: 855-207-9254

We will get back to you with the next steps for replacement as soon as possible.

Basic WiFi troubleshooting

Before contacting support, try these basic fixes:

Check WiFi is enabled: Look for the WiFi icon in the menu bar
Restart networking: Turn WiFi off and back on
Reboot the Pi: A simple reboot often fixes connection issues
Move closer to router: Test with the Pi very close to your WiFi router
Update your system: Run sudo apt update && sudo apt full-upgrade
Check router settings: Try a different WiFi network if possible
Use 2.4GHz: If your router has both 2.4GHz and 5GHz, try connecting to the 2.4GHz network

Try Ethernet:

If WiFi doesn't work but Ethernet does, this strongly suggests a WiFi hardware problem.