Hi,
For the following comment:
"I did followed the Software enablement slides step by step and get a valid image on the SD card"
We understand that you did the code example, the linker modification as well as the SDCard command usage with Cygwin, is this correct?
Can you help us share the capture of your IVT? Have you changed the state of SW11 as stated under the guide?

We have followed the same steps for the RDB2 SW Enablement Guide and can successfully see the LED as per the guide explanation.
Please, let us know.