Kontron KBox C-101 - Manual (Page 24)

7. System Overview KBox C-101 – User’s Guide (Version 2.00)
7.3.8. POWER Button and PWR LED
Fig. 15:Detail - Power button and PWR LED/Rescue button and RSQ LED
This power button (PWR, Fig. 10, Fig. 15, pos. 1) is used to initiate a system power shut down or power start up after a
power shut down. A forced system shutdown can be initiated by pressing the power button for longer than four seconds.
The power LED (marked PWR, Fig. 10, Fig. 15, pos. 2) is on green steady when power is applied to the system.
Prerequisite:
The KBox C-101 has to be connected to an appropriate main power supply (DC).
Even when the system is turned off via the power button there is still a standby voltage on the
baseboard. 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, the KBox C-101 begins to operate (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.
To perform an immediate forced shutdown of the system, press the PWR button for more than four seconds and the system
power is buttoned off (no matter what the state of the application or operating system is). Performing a forced shutdown
can lead to loss of data or other undesirable effects.
Once the system has been shutdown, it can restarted by pressing the PWR button (assuming that power is still applied to
the main input power connector, X101).
7.3.9. RESCUE Button and RSQ LED
The rescue function is not intended for use with a system in an application environment. It is designed
for a maintenance environment (where the standard BIOS flash is corrupted) to attempt to get the
system to boot in a defined and safe state for further failure resolution.
Please refer to the chapter 17 “KBox C-101 CPLD Specific Registers”.
The RESCUE button (RSQ, Fig. 10, Fig. 15, pos. 3) is used to force using the backup flash for system booting. The RESCUE
LED (RSQ, Fig. 10, Fig. 15, 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 using the PWR button or remove power
completely from the system and then reapply.
4
1
3
2
1 Power button (PWR)
2 Power LED (PWR)
3 Rescue button (RSQ)
4 Rescue LED (RSQ)
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