DJM-2000 Mixer Locking.

I was playing normally with the DJM-2000 mixer and suddenly it stopped and the LED of the LIVE SAMPLER button just flashed.
I turned the mixer off and on but the error occurs again with a few seconds of the mixer on.
Any information about this problem?

See problem:

http://doctordjfestaseeventos.com.br/download/problem.mp4 

or