OSD Nero HTA7200 - High Pitched Sound

I set everything up the OSD Nero HTA7200 to an Anthem avm 70 8k via XLR 7 channels and 2 subs. When the room is quiet, there is a high-pitched sound coming from inside the amp. The sound is generating with the Anthem and the Amp powered down. The sound also continues with the OSD amp turned off with the power switch in the back of the amp in the off position.

The high-pitched sound only stops when the OSD is unplugged. I've moved all xlr cables away from the power cables but it did not help eliminate the sound. Do I have a faulty amp? Just purchased 2 weeks ago same time as the Anthem.