For about the past 4 weeks my 622 will, overnight, lose the picture and sound but all the menu functions will work and are up to date. Everything from the program guide to the DVR. Now I can also watch any recorded show, but the live stuff will not come up. If I change the channel enough a signal acquisition box will come up and it will run through all the transponders and never get a lock, it will sit on 0 of 5 for at least 30 minutes. If I do a soft reboot it will fix itself usually the first time, this morning I had to soft reboot twice. This happened last week sometime Friday late night/ Saturday early morning and none of my recordings got recorded for that Saturday. Also both my TV's will have this problem and I use only dual mode. Today makes the 4th time this has happened and it always happens some time over night. I have a good 4" on the left side of the box and nothing near it in any other direction to block air flow. It is also connected to the phone line. I've been searching and seen mentions of the black screen but this doesn't sound exactly like the same thing.