Hi, I've now got a problem with my xbox 360 S GB device. I haven't turned it on for a long while, and yesterday I turned it on and did a system update. The system update failed (stuck at downloading phase with some weird patterns showed on TV, not chessboard though), then I tried to shut down and restart the system, but after that there was nothing showed up on TV after all, NO ERROR CODE. If I start the system with the wireless controller, the controller will connect to the system(1 led showed up); if started with power button, then the controller won't connect to the system, and the led on controller will keep flashing(the entire circle). The power button is still showing green, as well as the led on power adapter box.
I tried switching HDMI cables, as well as composite cables, neither helped. Tried updating with USB drive, nothing happened. Y button+right bumper didn't help either.
Please help! Thanks in advance!