Amber >EFIS annunciator
F70 & F100 Professional
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The "EFIS" warning on the LH MFDU will trigger if one or more of the EFIS displays are off (fully dimmed).
To prevent the EFIS warning from generating, ensure that the PFD and ND brightness is set above the minimum setting on both the captain's and first officer's panels. The brightness controls for the PFDs and NDs are located on the respective EFIS Control Panels on the glareshield.
Mark - Just Flight