Hello.
This is a 1.01a PCB.
It's built but I can't trouble shoot because Step 10 has a mind of its own and goes on and off and sometimes just flashes.
Step 9 seems to have an effect on it.
If reflowed IC104 and replaced it, to no effect. I've also reflowed the switches, but that hasn't changed anything.
Here is a video:
https://youtu.be/RoPqnvw4OPQ
Fixed by clearing invisible flux that must have caused a bridge somewhere.