Problem with DJM-900 NXS (locked and red light)

Hi as the title I've had a problem encountered in the past on my DJM 900 NXS, I link a video where I happened on an evening.
Virtually it hangs alone when I'm playing, and it starts to flash a red light as seen in the video.
I had already taken to care for this problem is I was told that the problem was solved, invence well as you can see has only worsened the situation.

I apologize in advance for the language, but I'm Italian.

LINK for VIDEO: http://www52.zippyshare.com/v/RnPhnuQK/file.html