So I recieved my hd pvr around christmas time and ever since i've been having a problem with my pvr. Occasionally while im playing a game on my xbox or watching tv my screen will flicker for about 5 seconds and say "No Signal" and then goes back to normal after those 5 seconds. Is there any tips for this problem Ive updated the drivers tried different inputs but it happens a bit too often now and gets annoying.