I don’t see any problem with the charger you used to power the device, I use a 9v dummy adapter with a USB-C end to power it and did not have any trouble with that.
I also changed the power mangement settings in the BIOS, to be precise enabling turbo boost. This was also shown in a Youtube video and I don’t see any problems with changing that. After changing that setting my board also became unusable and would not boot anymore, which I eventually fixed with the BIOS programmer set.
After I got the board back to life I changed the exact same setting and the second time it worked just fine, I can also confirm the turbo feature works because the CPU goes to it’s max speed when needed.
I still don’t know what caused the problem the first time. And yes, there are options in the BIOS which can cause the board not to boot anymore but I did not change those. Afterwards I tested a few settings, I found out setting the dual channel memory option will cause the board not to boot anymore, the problem nn_hung also mentioned. I think these options need to be removed, unaware users can easily break their Rock Pi X with that.