I did a full DIY assembly on a B.87 EX and am having some issues. I have 2 full columns of keys not working (F4, 5, t, g, b, space, etc). I have looked at the firmware uploading guide multiple times and tried two separate versions of the firmware file just in case.
I am confident in my soldering skills and cannot find any obvious cold solder joints or shorts. Do you have an electrical schematic available that I could use for troubleshooting? Also, my order number is #4815 if that is of any help.
Wow, just looked at that exact pin with a 10x lens and I do believe that it did not flow properly. I will reflow the solder on that row of pins and report back if it works. Thank you so much for the help