I had my UCX II about 4 months and it palyed fine. I also got a cooler for it to reduce the temprature.

About a week ago, I had noise in my headphone when I turn it on. The noise only showed in the outputs and will lasting about 5-10 mins then disappeared. First of all，I thought it was my headphone broken, so I tested it with 5 different headphones, and the noise was still there. Then I disconnect all the cables only left power and headphone but the noise still showed up.

This noise cannot be recorded. It only showed in my outputs headphones.

Can anyone give me any solution for my issue? It will be hard for my to send this back to Germany.