I have two Udoo's. I'm using the first Udoo for Openhab and it's solid as a rock. The second Udoo I am using for OpenMediaVault. The second Udoo hangs now and then. When it hangs there is no response what so ever. A reboot is needed. First I though it was OMV, so I decided to switch the Micro Cards. The result now is thst OMV is stable and Openhab hangs within hours. When the Udoo hangs the cool sink is also very hot. It looks that my second Udoo is having a hardware issue. How can I request a RMA?