Can't connect to internet after updating new Firmware wrt54g Help please!

So i just updated my firmware on my wrt54g ver 2 router, went through all the steps it updated successfully after that i hit the reset button and unplugged the router as tehe online instructions said to. Now i can't connect to the interent at all with either of my two wired computers or through the wireless. All the lights on the front of the router are on like the power, internet, and wireless connectivity. Also the the two WAN ports my computers are connected to in the router the lights are on and it's recognising them. But I can't connect to the internet or even see the router on my network settings. Somone suggested to reconfigure the router but when i go to set up new connection my computer doesn't detect the router and also i cant connect to the router using the ip address 192.168.1.1/ since there is no internet connection. Is there a way to get to the router options or a way to revert it to its old firmware. Any help would be much appreciated. I should after updating the firmare the power button is contantly blinking.

I am having the exact same problem..  I have the same router and same version as well.. I followed the directions and upgraded the firmware. it said update successfull and then I reset it and power cycled it to find that my network no longer works and I cannot access the router..I've looked through all the troubleshooting guides and they do not help..  It says if you can't access the web based page then to use the TFTP  utility to re-flash the router’s firmware but it seems it cannot make a connection to the router..  I've tried to ping it like it says to in the TFTP guide but it does not seem to be able to make a connection to the router..  I tried to access Management Mode to recover the router and resume the loading of the firmware upgrade but I can't get the Management Mode Firmware Upgrade page to open as well..  So what gives?  I followed the directions  but the only thing I seemed to accomplish was to brick my router..   Does anyone have a clue on how to go about fixing this problem?   Any help is appreciated.. 

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