Advanced Flight Systems AF-5400 - Screen Hardware Reboot

Version 15.0 AF-5000 Series Pilot Guide 18
Screen Hardware Reboot
The display CPU can be rebooted by pressing and holding (Button 1) and (Knob 1) for 40 seconds. This causes the
internal hardware to reboot and reinitialize the system. This should only be required if the EFIS failed to load the
software.