if the mod chip got messed up, then you can try to boot it up with its own backup by hitting both eject and power buttons at the same time...it should boot into your mod chips operating system with the default settings re-loaded...i know this works on some chips... then i guess i would reflash the bios you were using...i would suggest the newest x2 bios that you can get from xbins or autoinstaller3(from a torrent site) make sure to use the version thats right for you(1.1 or 1.6 flavor) depending on your xbox. might as well remove all the bios files (if you have more than one) first and then reflash so you dont run out of space... youll only need the x2 anyways. it will make its own default config file on drive e: when you boot. if all else fails you can download the newest operating system for your modchip from thier website and upgrade it...then do the bios flash thing...
its not a dashboard, its the operating system's GUI your seeing. avalaunch or media center would be dashboards.