Buffalo router with Tomato firmware--is it dead?

Hey all. I have a Buffalo WHR-G54S with Tomato firmware. It's a few years old but has always worked well. Yesterday I noticed the wireless connection to the laptop was getting erratic and I had to "repair" a few times. Today I woke up to no connection and the SSID is not being broadcast. The laptop sees plenty of other networks, just not mine. I tried to log into the Tomato firmware and the user/password combo (which I KNOW is correct) isn't recognized, so I can't get in. The unit looks normal, all lights are on, and internet passed through the router via Ethernet is OK (using it right now). I've rebooted and power cycled everything a couple of times. We've had some mild storms lately and perhaps a power surge but everything else in the house seems OK. Is there anything I can do to get into the firmware or is this router fried? Just want to make sure before I go spend another $50. Thanks.

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