Hi, I have a xbox 360 slim with the 250 gb hd. I have had it over a year and everything has been perfect. The last couple weeks I will go into a game online and the first game the connection is perfect. Every game after the first game I go red bar and black screen. My nat is open, I have a wired connection, I have replaced the entire ethernet cable, tested the modem and the router, reset the router to factory settings. When I plug the ethernet line in my laptop and do a speed test it still pulls 25 download and 5 upload with a 10 sec ping. In the graph the connection is dipping. All other lines in the house do not do this. My question is have any of you heard of the ethernet port going bad and causing this lag? I dont know what to do except trying to plug my xbox in another line somewhere else in the house. Thanks.