grishnakhMake sure that your PSU is not dead before doing anything.
You can try restore factory defaults: (I never try it

)
picture
https://en.bitcoin.it/wiki/File:Avalon-703n-front.JPG1. Reboot (Power Down and then UP)
2. When the blue LED starts flashing, press the SW2 button
3. Stop pressing the SW2 when the blue LED starts flashing quickly
At this time the router is in failsafe mode.
4. Telnet 192.168.0.100. It will take you to the root prompt.
5. Enter "firstboot" at the prompt to reset the router to defaults
6. Restart
If router is dead you can replace it with tplink 703n or connect avalon to computer via USB.