Beside the Known Issue seeedstudio.com/wiki/Seeedui … nown_Issue it seems that the “D13_LED” PCB Jumper Pads has an error and was designed wrong. In the Eagle file (board view) is one pad with no connection! So cutting the trace has no effect. Don’t know why so a sloppy error can happen, any QA? Any testing? This is version 3 of the board but it seems to be more buggy than the older versions before.
Can you confirm this issue and add a note to seeedstudio.com/wiki/Seeedui … nown_Issue . What trace would you cut to deactivate LED 13?