@martyn said in AHRS PUSH TO SYNC + RMB powers off HSI and AI:
"In the slaved and DG modes the HSI and the main attitude indicator power failure warning flags are displayed while the PUSH TO SYNC control is pressed."
Aha, so that's how it is supposed to work. In the Lock interaction mode nothing happens if you just press with LMB, with LMB+RMB it actually presses the button (hence the flags) and with LMB+MMB you release the button. A bit quirky, but it works. Thanks for the explanation!
For people who are struggling with the Lock interaction mode (like me):
LMB: Lock to the control. Move mouse pointer to operate the rotary (i.e. change heading).
LMB+RMB: Push the button.
LMB+MMB: Release the button.