PCB has continuity but a single key doesn't work

[TheFandorn]

Hi, so I just bought the RK84, knowing that the M key doesn't work and I thought that the socket just popped of or something among these lines. However the socket is in place and it has continuity when i press the switch. There is also continuity between the socket and the diode and with the rest of the column. All the other keys work fine. Any ideas?

[suicidal_orange]

If the socket comes off usually it takes the pad with it and continuity is lost.  If it really is connected both sides could be the switch that doesn't work, the diode could be soldered backwards or it could be dead (check for continuity with the probes one way but not the other) or the connection from the other side of the diode to the other diodes across the row could be broken, or for some reason there could be no code assigned to that key in the firmware (it's not this if it's a commercial board)