I’ve contacted the support team already, but thought maybe someone from the community knows any tips as well.
So, I’ve got my Spark Core, that is connected to a 5V/3A power adapter.
I’ve turned off and on the power many times before, but just yesterday, it didn’t start on again.
When I plugged it out and connected it with USB to my Mac, neighter of the two LED (User/RGB) didn’t turn on, but the Spark Core does get noticable warm on the underside.
I can’t say wheter it’s the Power Regulator or the ARM Microcontroller but it’s definately one of both.