(seeing as how this is gaming-related [or at least gaming system-related], this is the best place I could think to put this)
I have no idea what is going on, but I think my 360 might RRoD any day now. Why? Read below.
This is how the start of Aquatic Base looks like in Sonic06 on a normal display.
This is the exact same location with the problem I'm having.
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Now, before anyone says "well u broked ur 360 playing lolsonic06", I should let you know that I wasn't playing Sonic06 when I first encountered this issue. I was playing Rock Band 2 (and the song "Still Alive", which is the end theme to Portal [which I beat recently]). Right at the beginning of the mentioned song, the display started to ask all screwy. Some lines began to appear, so I thought it was a disc issue. After returning to the dashboard and finding that the display remained screwy, I reset the 360. I resumed what I was doing before and the problem returned, but worse than before. I read through
xbox.com's support page about an unclear image and did everything they said to do, but this issue kept returning (twice, the lines appeared right when the 360 logo appeared on boot). It did this several times in Rock Band 2, once in Portal (specifically, Portal: Still Alive), once in the CoD5 multiplayer beta, and every time I tried to play Sonic06. Sonic06 was the worst one, since the second image above was what resulted from it (which meant it was pretty much unplayable). I personally think that GLaDOS is getting her revenge for me killing her over and over at the end of Portal (since it happened when playing the end theme to Portal).
Is this a sign my 360 is about to RRoD? :(