Are you having problems with your hardware (Cannot see your Intel(R) Xeon Phi(tm) coprocessor? Sporadic accessibility?) or with the Intel(R) Manycore Platform Software Stack (Intel(R) MPSS) running reliably?
Attached to this post is a PDF "flowchart" that explains how you can troubleshoot the problem (note: this applies if you are running the Linux* operating system on your host), and shows what information you will want to collect if you need to escalate your issue to your OEM provider or Intel.
We hope this is is useful to you! Please let us know if you have found a boundary condition not comprehended properly by this "flow".