H20 Reboot/Power Down During Menu - DirecTV DVR

For H20 Reboot/Power Down During Menu, relating to DirecTV DVRs and receivers. I've seen the other posts about random power downs of this receiver, but my problem is more specific. I don't have any problems with the receiver during normal use. I can watch hours of tv and use the guide all perfectly. But whenever I hit "Menu" I have about 30 seconds or so to exit out of it before the receiver turns itself off and goes through the whole reboot and finding satellite signal process. It's very annoying. I effectively can't make any changes to my setup because of this problem. Any suggestions to this? Or is my receiver just screwed and need to be replaced?