PLA5456 high pitched noise from both adapters

Cassano

I recently bought a kit of pla5456 after years of reliable service from pla4201 V2. Sadly the adapters both have constant extremely high pitched noise. Would this thing go out in time like some GPUs does or I need to RMA them? I'm asking because of the narrow window from the retailer to do that. 

#PLA_December

Ijnrsi

@Cassano
The noise should come from HW, I recommend you directly RMA to ask the support. 
Or you could fillout the form: https://goo.gl/MqnwDR.