Try crash recovery. Turn the router off, hold in the reset button and turn it on. Continue holding for 15 seconds and release. After boot up, go to 192.168.0.1 and a firmware screen should appear. Load the latest firmware. If it does not work, try 2-3 times. If it still will not work, router is dead.
Note you will have to statically assign your computer (192.168.0.2 / 255.255.255.0).