On my MB-6582, some of the buttons are being weird (Most noticeably SID 3 and 4, and sync and CC), and a whole row of LEDs is not working (the bottom row of the matrix). I tested all the connections between the baseboard and CS board and found the following shorts: JD1 - D0 D1, D3 D4 JD2 - D0 D1 D2 D3 JD3 - D3 D4 JD4 - D2 D3 D4 JD8 - D6 D7 As far as I can see, there's no reason for them to be shorted. The soldering is fine where I'm testing. I tried to trace back a few of the li