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Parts Information

Document ID: DDSE-43EV44

Netfinity 5000 - System Board Switches

Applicable to: World-Wide

System Board Switches
The following table provides the system switch identifiers and descriptions of these switches. The system switch block is identified by key 3 in the illustration at "System Board Connectors".

Note Turn off the server and disconnect the power cord before moving any switches.

Table 11. System Board Switch Block SW1

Identifier	Switch Description
1	Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor. See Table 12 below for details.
2	Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor. See Table 12 below for details.
3	Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor. See Table 12 below for details.
4	Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor. See Table 12 below for details.
5	When On, perform BIOS recovery using boot block (boot block recovery). The recovery boot block is in a protected area of flash memory that cannot be overwritten. When the BIOS becomes corrupted (for example, if a power failure occurs during a flash update), the recovery boot block can be used to restore the BIOS. The code in the recovery boot block enables the server to start up and read a flash diskette. The flash utility automatically recovers the system BIOS from the BIOS recovery files on the diskette. When the flash is complete, the switch must be moved to the Off position. The default setting is Off (disabled).
6	When On, sets the host bus speed to 66 MHz. When Off, the host bus speed is 100 MHz. The default setting is Off.
7	Power-on override. When On, overrides the power-on switch and forces power-on mode. The system will always boot without the use of the power-on switch. The default setting is Off (disabled).
8	When On, bypass the power-on password. When Off, require the user to enter the power-on password at startup if one is set. The default setting is Off.

Note If the processor in you system does not react to switch changes, it is not an error.

Table 12. Switch Settings for Microprocessor Speed

450MHz and Up
All microprocessors of speed 450MHz and up will automatically set their internal speeds, so the switch setting is not applicable.

Bypassing an Unknown Power-on Password: When a power-on password is set, POST does not complete until you enter the password. If you forget the power-on password, you can regain access to the server through one of the following methods:

• Enter the administrator password at the power-on prompt, if an administrator password has been set. (If necessary, see Using the Administrator Password Menu for details.) Start the Configuration/Setup Utility programs and change the power-on password. See Using the Power-on Password Menu.
• Change switch 8 on the system switch block to On (Bypass Power-On Password). See System Board Connectors for the location of the switch block.

	Search Keywords
	Document Category	System Boards
	Date Created	23-12-98
	Last Updated	21-05-99
	Revision Date	16-03-2000
	Brand	IBM PC Server
	Product Family	Netfinity 5000
	Machine Type	8659
	Model	ALL
	TypeModel
	Retain Tip (if applicable)
	Reverse Doclinks and Admin Purposes