apple tv 2 dead after maintenace update

hello,

a couple of weeks ago my apple tv went dead after i conducted a maintenace update in the atv flash maintenance menu. the system worked fine before. after the update the apple tv 2 went into a restart but never got online.
i did do all the reser stuff (power, remote reset,) and i tried to connect it to my (windows) computer but the computer gives getting me meaasges that the usb device is not recognized. i tried to get it via various methots into dfu but no cigars. bottom line nothing worked to get it going by itself or get recognized by itunes…any suggestions???