I have a DVR 625 (dual-mode), After a couple of hours of use, TV2 starts to fade to a Black and white picture then the audio drops completely. DISH sent me a replacement receiver yesterday and the new receiver has the same exact issue. Is this a problem with the L413 firmware? Am I the only one with this problem? I can't possibly have the only two 625's with the same exact problem, which make me think it's something wrong on my end? Any help is greatly appreciated!