The document attached by you is very useful. According to this I can conclude that the 1KB / 1RB board is defective.
Do you have any idea what the difference is between the two 1KB / 1RB boards, the first one has the yellow tabs and the second one has the red tabs. These tabs can be seen in the attached picture.
Another difference exists between the identification codes 50999-2824R00 the one with the yellow tabs and 50999-2824R11 the one with the red tabs.
Thank you!
Regards.