You say the OBi's power LED is not flashing but that does not inform us as to whether it is on or off and if on what colour. Within a couple of seconds of powering up it should be steady green. If it is, simple things first:
1. Power cycle the router. Wait 2 minutes and power cycle the OBi200.
If still not working:
2. Plug the ethernet cable from the OBi200 into a different LAN port on your router and power cycle the Obi200.
3. Use a different ethernet cable. and power cycle the OBi.
If the power LED remains red.
https://www.obitalk.com/info/faq/Troubleshooting-sec/My-power-LED-is-red