PD Board Noise?

[peronis]

Hi all,

The kids just wired up the electronics for prototyping and such. The power distribution board seems to be emitting a high frequency noise, not unlike the CRT TV or monitor noise you hear sometimes, or even a bad bearing in a heatsink type noise. I am not familiar with the inner workings, but I am pretty sure last years board didn't have this.

We disconnected all the connections to the board except the battery, and tried to narrow it down to maybe a bad snap action breaker to no avail.

I feel pretty worried that the board might be bad, or have a chance of failing at a bad time. Should I contact FIRST about this? Has anyone observed the same noise? Thoughts?