MCP Suddenly Not Responding to Any Inputs (GE A300)

[unhinged_aviator]

So I've been mostly flying the PW A300 for the last few weeks, and decided to hop back into the GE jet (stock Fedex livery).

I perform the usual checklists and when it comes time to setup the avionics in the MCP (once the IRS are aligned, pitch trim, yaw damper and ATS switches all ON), I get the digits to display in the various windows, but turning the knob produces to changes to the input.

So the plane is essentially grounded, as I can't set an altitude, V2 speed, heading or DH.

Using just the keyboard right now, no external yokes or other controllers.

Setup pictured below.

[unhinged_aviator]

Same issue with the PW variant.

[unhinged_aviator]

Solved by restarting the whole sim.