My 360 has just RRODed on me.
but its done 2 RROD codes.
The normal lower 2 and top left lights but also done the top 2 and lower left.
I also found a site that listed pressing both the sync and eject button at the same time then pressing the eject button 3 times will give different right light flashes to see that the error is.
mine flashes
All 4 when you 1st press the buttons then
top left
all 4
top left and right
but its done 2 RROD codes.
The normal lower 2 and top left lights but also done the top 2 and lower left.
I also found a site that listed pressing both the sync and eject button at the same time then pressing the eject button 3 times will give different right light flashes to see that the error is.
mine flashes
All 4 when you 1st press the buttons then
top left
all 4
top left and right