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 are PDF "flowcharts" that explain how you can troubleshoot the problem (note: Both Linux and Windows flowcharts are available), 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".