Lenovo 3719, 3821, 3822, 3823 manual Jumper Number Name Jumper setting

		Table 6. System-board jumpers
			Jumper	Jumper
			number	name	Jumper setting
			JP6	UEFI boot	v Pins 1 and 2: Normal operation (default).
				recovery	v Pins 2 and 3: Enable the UEFI recovery mode.
			JP1	CMOS	v Pins 1 and 2: Normal operation (default).
				clear	v Pins 2 and 3: Clears CMOS.
			SW6	switch
				block
			Note: If no jumper is present, the server responds as if the pins are set to 1
			and 2.
Table 7. 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 off, this loads the primary IMM firmware ROM page. When on, this loads the secondary
	(backup) IMM firmware ROM page. (Default off)

Notes:

1.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 Chapter 2, “Safety information,” on page 5).

2.Any system-board switch or jumper blocks that are not shown in the illustrations in this document are reserved.

134ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual