That's frustrating! Let's troubleshoot:
1. Power cycle: Turn the router off, wait 30 seconds, and turn it back on.
2. Check the power cord and plug for damage or issues.
3. Ensure all cables (Internet, Ethernet, etc.) are securely connected.
4. Restart your modem (if separate) and then the router.
5. Check for firmware updates and install the latest version.
6. Reset the router to its default settings (check the manufacturer's instructions).
7. Check for physical obstructions or interference from nearby devices.
8. If you've recently changed settings, try reverting to previous configurations.
9. If none of the above works, the router might be faulty (consider contacting the manufacturer or a repair service).
Hope this helps you get back online!