SC48 Phantom Power Issue

[d barker]

On inputs 11 & 12 (top layer) when I engage phantom power on the channels I get a "pulsing" input signal indication. If I remove phantom it goes away and it does not appear on any other channels and does not appear on the same faders on a lower layer.

With phantom on the channel it works fine I have input no problem. The channel also works fine with out phantom. I don't hear any noises or pulsing when cued up.

Just have this pulsing input signal.

Any ideas? Anybody seen this before.

Thanks