So this started around a week ago. About twice a day (at least) I have to reboot my 622 by holding the power button because I get no video, only audio. Any idea what may be the cause? If I get a replacement 622 will all my shows I have saved on my external drive be able to be viewed once I connect it to the new 622? Has anyone tried this? I'm real hesitant to replace my 622 if I'm not going to be able to view the shows I have saved on my external drive.