Thank you for the quick reply.
I have followed the instructions in the link you have provided and I have also tried a different 12v power adapter.
I have also created a support ticket but go no reply that is why I am trying this forum

Any other tips would be greatly appreciated.
I fear it is effectively dead. Check your router's admin pages to see if the Obi is connected to it. In the very unlikely event that it is, try pointing a browser at the OBi's IP address and report back what happens.
The only other way to flash the unit might be via serial cable or JTAG but I don't know if the OBi implements those. Anyway if you had the equipment and knowledge to use those techniques they would have already occurred to you.