I just have purchased a brand new Rock PI 4cplus device and wanted to boot from MicroSD card (which is working in a Raspberry Pi) but unfortunately the Rock Pi4 does not boot at all, there is only a
constant green light.
I tried several different MicroSD cards which are all functional and
work with RPI, but no luck with the Rock Pi4 device.
I booted into MASKROM mode and used RKDevTool v2.86 under Windows11 to read
info regarding flash and chip with no success. I therefor assumed that
there is no bootloader on board and flashed the latest bootloader
rk3399_loader_spinor_v1.20.126.bin.
When I again power-up the device with using MicroSD card, again not boot at all.
What can I do to fix this situation?