I have a chinses dm800se HD clone machine which called dm800se HD SR4 i download offical opendreambox sourece code on Ubuntu 10.04 and then compile it after about two weeks i resolved all errors and get a new image. this image we can called it official image. i have flash it into my machine,but my SR4 machine doesn't work,it show "no ca" in the front small LCD screen. at this time somebody tell me that you must flash 84d.nif file after flash official image, i do this. after this my SR4 machine can work. i can see the first logo picture on TV, but after a while, it becomes black, can you help me?(somebody tells me you must have to replace driver file, he send me drive file,how can i replace drive file)