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4.4.8. POWER Button and PWR LED
Figure 17: Detail - Power button and PWR LED/Rescue button and RSQ LED
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The power button (PWR, Figure 17, pos. 1, Figure 59, Figure 61 and Figure 64) is used to power the KBox C-102 on or off.
By pressing the power button for longer than four seconds a forced system shutdown will be initiated, before the
power to the system is turned off.
Caution: Performing a forced shut down can lead to loss of data or other undesirable effects!
The power LED (marked PWR, Figure 17, pos. 2, Figure 59, Figure 61 and Figure 64) is on green steady when power is
applied to the system.
Prerequisite:
The KBox C-102 has to be connected to an appropriate main power supply (DC).
Even when the system is turned off via the power button there are parts of the system still
energized.
The unit is only completely disconnected from the DC mains, when the power is removed.
As soon as external power is applied to the main input power connector, X101 (Figure 14), the KBox C-102 boots up
and then starts the operating system and application where available.
To perform an orderly shutdown of the system, press the PWR button and the system shuts down under the control
of the operating system.
Once the system has been shut down, it can restarted by pressing the PWR button (assuming that power is still
applied to the main input power connector, X101).
4.4.9. RESCUE Button and RSQ LED
The rescue function is not intended for use with a system in an application environment. It is
designed to be used if the standard BIOS flash is corrupted, in order to get the system to
boot in a defined and safe state for further failure resolution.
Please refer to the chapter 17/ "KBox C-102 CPLD Specific Registers".
The RESCUE button (marked RSQ, Figure 17, pos. 3, Figure 59, Figure 61 and Figure 64) is used to force using the
backup flash for system booting.
The RESCUE LED (RSQ, Figure 59, Figure 17, pos. 4) blinks red when the backup flash is selected for booting. The
backup flash contains a cloned BIOS (uEFI) version. In the event the system does not properly start-up or gets hung-
up and restarting (cold booting) the system does not help, it is possible to switch to the backup boot flash and then
restart the system. To do this, press the RSQ button for more than five seconds, whether or not the system is running
it will now start-up using the backup flash for booting.
To revert to using the standard boot flash, the system must be cold started, or remove power completely from the
system and then reapply.
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Power button (PWR)
2 Power LED (PWR)
3 Rescue button (RSQ)
4 Rescue LED (RSQ)
KBox C-102 - User Guide, Rev. 1.0
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