Hope someone can help I have a 3M MP7750 and I have switched it on and get a striped display, the menu is unreadable it is just made up of squares. It has a green power light but no warning lights the bulb and fan start up as normal just get stripes running from the top to the bottom of the screen and no picture. Audio is fine and when you press the input you get no display and all the text is made up of squares?? I don't think it is the bulb as I am getting picture just can't make out the picture or menu.