34 Keysight M9036A PXIe Embedded Controller User Guide
Using the Controller Chassis shutdown
If the chassis and M9036A are powered up, pressing the ON button for greater
than 5 seconds causes a forced shut down of Windows but, as before, the
chassis will not be powered off. At this point, you have the same two options
listed in the previous paragraph. However, Windows safe mode may be displayed
if the M9036A is turned on because of the forced shut down of Windows.