Presonus Studio Live 16.4.2

Dear
Technical Support Team ( Presonus)

I have a Presonus Studio Live 16.4.2 mixer in my studio...Its a Good Mixer for live as well as Studio Recording Purpose.
From Last 2 weeks i am getting a problem with this.The problem is on working time a Beep sound is appearing and the mixer get Hang.
Now when i m restarting the mixer again the GR meter getting totally RED color and the mixer dose not working.
Can You guys please tell me what should i do and what the problem of the mixer ..
if you plz mail me asap at my mail id :debojit08sengupta@gmail.com it will be better for me to further access..

Thanks & Regards
Debojit Sengupta