Thanks for joining the Desktop Board community.
I understand after performing BIOS update through exe file, it does not access BIOS.
Please try testing the board with BIOS recovery method. You may need to run one version down.
Instructions for BIOS recovery available below:
File name: PG0147.BIO
After running BIOS recovery 0147, you can download and install version 0148
File name: PG0148.BIO
Thank you for your advice and sorry for the late response, but we had to hold our deadline, and there was no time left for rewriting.
As I had written in my first post, we had already tried this instruction, but it didn´t work. The problem is as described, that I can´t get to this point anymore.
Thank you again for your advice. I will do so and write again if there is a solution for this problem.
There was no other solution than sending the board back.