As of lately some buttons that I press don't seem to be registering to the box. For example, pressing the ON DEMAND button will cause the small blue light to flash (which I assume means the box got the signal) but the On Demand section wont open. This happens to other buttons as well like the MENU and Last button.
As for the guide issue, pressing the GUIDE button does make the guide open, but the guide does not show in full screen mode with all upcoming shows for each channel. The guide I get only displays the TV Networks.