Got a 435 XDE, and set it up yesterday. Upon turning it on, both the media box and screen's standby lights go green. The picture on the screen appears to come on, (slightly brighter then pitch black !) and then after about 10 seconds, a "click" can be heard from the screen where upon the screen goes completely dark (back to pitch black), and switches the media box back to standby (red light) the screen's standby light stays green but flashing. Any ideas anyone?