> Model: WNDR3400v2|N600 Wireless Dual Band Router
Firmware version? Connected to what?
> Stopped working
Not a useful problem description. It does not say what you did. It does not say what happened when you did it. As usual, showing actual actions (commands) with their actual results (error messages, LED indicators, ...) can be more helpful than vague descriptions or interpretations. Any actual information might be more helpful than "Stopped working"
Visit http://netgear.com/support , put in your model number, and look for Documentation. Get the User Manual (at least). Read. Look for the LED descriptions and "Troubleshoot". Further reading might not hurt, either.
