System-board jumpers and buttons
The following illustration indicates the location of the jumpers and buttons on the server.
If there is a clear protective sticker on the top of the switch blocks, you must remove and discard it to access the switches.
Figure 1. System-board jumpers and buttons
The following table describes the jumpers and buttons on the system board.
|Jumper and button name
|Jumper setting / Button function
|1 Force NMI button
|This button is on the rear of the server. Press this button to force a nonmaskable interrupt to the processor. You might have to use a pen or the end of a straightened paper clip to press the button. You can also use it to force a blue-screen memory dump (use this button only when you are directed to do so by Lenovo Support).
|2 Power permission override jumper
|3 Force XCC update jumper
|4 Clear CMOS jumper
- Before you change any switch settings or move any jumpers, turn off the server; then, disconnect all power cords and external cables. Review the information in Safety Information page, Installation Guidelines, Handling static-sensitive devices, and Power off the server.
- Any system-board switch or jumper block that is not shown in the illustrations in this document are reserved.