I have a WRT54G v4 that I have successfully upgraded via the Linksys Upgrade tool. I assume after the upgrade, the router reboots, but then the Power light still flashes. I can ping the router and upgrade again, but cannot access the WEB GUI. I have tried the Linksys Upgrade tool, as well as using a tftp tool from their website. I am upgrading with their latest firmware version 4.30.5. Is there anything else I should try? Do I need to get a JTAG cable and go that route. From what I have read, it seems as if I need to erase the NVRAM. Does this sound right? Thanks in Advance.