The SID R LED is a bit dim, when activated with SID L, or by itself.
Two LEDs in the matrix (row 3, column 3, and row 4, column 3) do the opposite of what they’re supposed to when the Mode LED is set to “Meter.” (On by default, off when the rest in their row/column are on). Those two function fine when the Mode is set to Matrix.
I don’t see any shorts, and I tried resoldering the cables between the base and CS PCBs.