Multiple columns not working b87EX

[ZacharyParticipant]

Hello,

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.

Thank you!

[flashteker@gmail.comKeymaster]

Hi Sorry for your inconvenience.

I think one of main controller pins was bad soldered.

I attached a pic in which you can see a pin painted green.

Please check that pin.

Thanks.
Hojin.Yi

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[ZacharyParticipant]

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

[ZacharyParticipant]

It worked! I reflowed only the pin you outlined and both columns are functioning normally now. Thank you very much.

[Author]

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