If you install an original image, you need to flash it, and prior to reboot, you need to flash the SSL84J. This done you will have to boot the box and replace the driver file in the driver folder,

in DM800HDseV2 the folder is : /lib/modules/3.2-dm800sev2/extra
and file to replace is : bcm7405.ko

On other boxes, it should be around the same (eg. dm800sev2 will be dm8000 or dm800se or dm500hd, etc), and the bcm file will always be a bcm7xxx.ko

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