Critical CX-2 , Bishop issues

[ABM_InkMan]

Hello everyone ! Just wondering if anyone else has had this , or a similar issue.

I've been running my Critical CX-2 for about a year now and only using coils, and have had no issues at all. My wife had purchased a Bishop for me for xmas and for the first few days it ran smooth. The readout was showing all zeros across the board. Then, out of no where the readout started showing random numbers for Speed, Duty and Amps... bouncing all around and causing my bishop to change speeds and now it is making a loud ( for a rotary ) buzz.

Anyone know what would cause this?.. does it sound like the CX-2 has an issue? Is the bishop the issue?

any help or information would be amazing.

Thanks