System-Board Switches And Jumpers - Lenovo THINKSERVER 3822 Hardware Maintenance Manual

System-board switches and jumpers

The following illustration shows the switches and jumpers on the system board.
See Table 9 and Table 10 for information about the switch and jumper settings.
Table 10. System-board switch 6
SW 6 Switches Switch description
1 Reserved (default off)
2 Power-on password override when on. (default off)
3 Reserved (default off)
4 When this switch is off, the primary IMM firmware ROM page is loaded. When this switch is on,
the secondary (backup) IMM firmware ROM page is loaded. (default off)
Notes:
1. Before you change any switch settings or move any jumpers, turn off the server;
2. Any system-board switch or jumper blocks that are not shown in the illustrations
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ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual
Table 9. System-board jumpers
Jumper Jumper
number name
JP1 CMOS clear v Pins 1 and 2: Normal operation (default).
JP6 UEFI boot
recovery
Note: If no jumper is present, the server responds as if the jumper is on pins 1 and 2.
then, disconnect all power cords and external cables. (Review the information in
Chapter 2, "Safety information," on page 5.)
in this document are reserved.
Jumper setting
v Pins 2 and 3: Clears CMOS memory.
v Pins 1 and 2: Normal operation (default).
v Pins 2 and 3: Enable the UEFI recovery mode.