System-board switches
Use this information to locate the system-board switches.
The following illustration shows the location of the switch block on the system board.
The following table describes the functions of the switches on switch block SW8, the NMI button, and the power button.
| Switch | Description | Switch setting | Definition |
|---|---|---|---|
| SW8-1 | Password override | The default position is Off. | Changing this switch to the On position overrides the power-on password. |
| SW8-2 | Trusted Platform Module (TPM) physical presence | The default position is Off. | Changing this switch to the On position indicates a physical presence to the TPM. |
| SW8-3 | Real time clock (RTC) reset | The default position is Off. | Changing this switch to the On position resets the RTC. A momentary toggle is all that is required. To avoid excessive CMOS battery drain, do not leave this switch in the On position. |
| SW8-4 | Boot backup IMM2 uBoot | The default position is Off. | When the switch is in the Off (default) position, the compute node will boot by using the primary IMM2 uBoot firmware. When the switch is in the On position, the compute node will boot by using a backup of the IMM2 firmware. |
| SW8-5 | Boot backup UEFI | The default position is Off. | Changing this switch to the On position forces the compute node to boot from the backup UEFI image. |
| SW8-6 | Boot IMM2 recovery partition | The default position is Off. | The IMM2 recovery partition is loaded by changing this switch to the On position and moving the low Security (CN45) jumper to pins 1 and 2. Note Use this jumper only if the normal firmware update procedure fails and the operational firmware image is corrupted. Use of this jumper disables normal baseboard management controller (BMC) operation. |
| SW8-7 | Wake on LAN (WOL) disable | The default position is Off. | Changing this switch to the On position disables WOL. |
| SW8-8 | Real time management module (RTMM) flash bypass | The default position is Off. | Changing this switch to the On position forces the compute node to use RTMM ROM instead of flash. |
| NMI button | The default position is Off. | Pressing this recessed button causes the compute node to stop doing what it is doing. | |
| Power button | The default position is Off. | Pressing this button turns on or turns off the compute node. |
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