which is it?
Invalid user name or password, or your access has been locked due to multiple failed login attempts!

Best answer by SURFboard Moderator
Since you have already done resetting modem multiple times no need to repeat again and just want make sure you are holding reset button on the modem after disconnecting the coax cable so if that is done no issues, please try to access modem interface on direct connection without router because SBV2402 is just a cable modem sometimes router will not allow modem IP to access. Disconnect the router from the modem and connect any device to the modem ethernet port like desktop or laptop then follow the steps mentioned on below article.
http://arris.force.com/consumers/articles/General_FAQs/SBV2402-Web-Manager-Access
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