I've got the TW tech coming over tomorrow afternoon to diagnose a pixellation/no signal problem when using their Pace/DVI HD box. I've noticed the problem is primarily on Discovery HD, but sometimes is on others as well. Our set is a new Mitsu RPTV 65413, so I doubt that it's the problem. The cable wiring is split in my attic from one cable out to 4 locations. Any chance the HD box is not getting enough strong signal to decode or is it more likely poor transmission beyond my house? They claim to have not received any complains, but, I doubt it could be my location only. Thanks for any input/help.