Table 4. Callout descriptions (continued)

Notes:

1.If no jumper is present, the server responds as if the pins are set to 1 and 2.

2.Changing the position of the UEFI boot recovery jumper from pins 1 and 2 to pins 2 and 3 before the server is turned on alters which flash ROM page is loaded. Do not change the jumper pin position after the server is turned on. This can cause an unpredictable problem.

Table 5 describes the function of each switch on the switch block.

Table 5. Switch block 3, switches 1 - 8

Switch

 

Switch

number

Default value

description

 

 

 

8

Off

Reserved.

 

 

 

7

Off

Reserved.

 

 

 

6

Off

Reserved.

 

 

 

5

Off

Power-on password override. Changing the position of this switch bypasses the

 

 

power-on password check the next time the server is turned on and starts the Setup

 

 

utility so that you can change or delete the power-on password. You do not have to

 

 

move the switch back to the default position after the password is overridden.

 

 

Changing the position of this switch does not affect the administrator password check

 

 

if an administrator password is set.

 

 

See “Passwords” on page 107 for additional information about the power-on

 

 

password.

 

 

 

4

Off

Reserved.

 

 

 

3

Off

Reserved.

 

 

 

2

Off

Reserved.

 

 

 

1

Off

Reserved.Clear

 

 

 

Clear CMOS. When this switch is toggled to On, it clears the CMOS data, which clears the power-on password.

Important:

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 “Safety” on page vii, “Installation guidelines” on page 33, “Handling static-sensitive devices” on page 35, and “Turning off the server” on page 31.)

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

System-board LEDs

The following illustration shows the light-emitting diodes (LEDs) on the system board.

Chapter 4. Server controls, LEDs, and power 27

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Image 43
Lenovo 3797 manual System-board LEDs, Describes the function of each switch on the switch block