System-board switches
The following illustration shows the location and description of the switches.
Important
- If there is a clear protective sticker on the switch blocks, you must remove and discard it to access the switches.
- Any system-board switch or jumper block that is not shown in the illustrations in this document are reserved.
Figure 1. Location of the switches, jumpers, and buttons on the system board
![Location of the switches, jumpers, and buttons on the system board](sd650_109-550.png)
![Location of the switches, jumpers, and buttons on the system board](sd650_109-550.png)
The following table describes the jumpers on the system board.
Jumper name | Description |
---|---|
1 Low security |
|
2 Clear CMOS |
|
3 Serial select |
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Switch name | Switch number | Switch name | Usage description | |
---|---|---|---|---|
4 PCH switch block - PCHSW1 | 1 | Machine Engine (ME) firmware security override | ME update by jumper. | Normal (default) |
2 | ME firmware update | Force update mode. | Normal (default) | |
3 | Password override | Overrides the power-on password. | Normal (default) | |
4 | Trusted Platform Module (TPM) physical presence | Indicates a physical presence to the system TPM. | Normal (default) |
Important
- Before you change any switch settings or move any jumpers, turn off the solution; then, disconnect all power cords and external cables. Review the information in Safety Information page, Installation Guidelines, Handling static-sensitive devices, and Power off nodes.
- Any system-board switch or jumper block that is not shown in the illustrations in this document are reserved.
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