Hi, My duo2 came with an error on screen and I rebooted. Then it was hanging in the boot loading for a while. I wanted to ref lash it, switch it off/on from the back and it didn’t start anymore. I just hear a sound “PAC!” from inside every 2 sec. I think it is the PSU. Where can I buy a power supply board from? Any advise? I google it but I can hardly find one. Thanks in advance for your help!