1698 Elite LB broken

[jvcr]

I check the SW1 (LB) button with a multimeter - it works. I check the chain from the top to the bottom board (in the area of R32 and C54) - everything is fine. But where does the path go next? I stop at a point near the R32 marking, the circuit is working, but where does it go next?

[RDC]

I haven't stripped that board down, but it goes to the MCU, just taking an internal layer.

[jvcr]

Is there a way to check?

[RDC]

Not really given it's a BGA package. The 1697 and 1698 I've seen more than a few that need the MCU reflowed to correct one issue or another.

[jvcr]

found out the problem) the previous owner configured Elite in such a way that this button is disabled