Diodes time, and like the electrolytic capacitors from before we need to take care which direction we install these. If you look at the board image below, you will, see on the right hand side is a indication of the striped part of the diode should align with.
So when installing, you will see on these diodes a black strip on one end, orientate these according to the markings as below
Again refer to the guide to see where to add each diode.
END