I may have a similar problem like described in previous posts. I’ve assembled the EDU08 and when switching it on, the screen backlight works, but nothing is displayed on the LCD itself.
In my case the screen backlight is unstable and flickers sometimes, but not always.
There are also very strange Voltage readings at SK1.
I measured with the unit switched on, and the ground test lead attached to one of the holes for the screws, which is ground if I’m not mistaken.
I got this:
top row. left to right:
3.3 3.1 3.2 3.2 3.2 1.1 1.2 0.0 0.5
bottom row, left to right:
0 3.3 3.3 3.2 3.2 2.0 0.7 0.8 1.7
I would really like to understand what I did wrong, so I would appreciate if you could guide me to troubleshoot the unit.
Thanks & best regards
A video to show what happens when switching it on:
Some photos of the assembled board, and the way I measured at SK1: