Silicon Graphics 1400, Maintenance And Upgrade Manual

Page: 115 / 162

Baseboard Jumpers
101
CMOS Clear Jumper
The jumper at pins 1, 2, and 3 controls whether settings stored in CMOS nonvolatile
memory (NVRAM) are retained during a system reset.
Procedure to restore the system’s CMOS and RTC to default values:
1. See “General Procedure to Change a Jumper Setting” on page 100.
2. Move the CMOS jumper from pins 1 and 2 to pins 2 and 3 (the Clear CMOS memory
position).
3. Reinstall the access cover for your safety (using the original screws), and connect
the power cords to the system.
4. Turn the system on. Wait for POST to complete and for the messages “NVRAM
cleared by jumper” and “Press F2 to enter Setup” to appear. This automatically
reprograms CMOS and RTC to their default settings, except for the password.
5. Enter Setup and make any changes necessary (for example, changing the boot
device). Press F10 to save the new Setup configuration and exit Setup.
6. Turn off the system, and disconnect all AC power cords from the system.
7. Again remove the access cover.
8. Move the jumper from pins 2 and 3 back to pins 1 and 2 (the Protect CMOS memory
position).
9. Reinstall the access cover using the original screws, and connect the power cords to
the system.
10. Run BIOS Setup or the SSU to verify the correct settings. See Chapter 3 in the
SGI 1400 Server Family User’s Guide.
Password Clear Jumper
The jumper at pins 5, 6, and 7 controls whether a stored password is retained or cleared
during a system reset.
Procedure to clear the current password and then enter a new one:
1. See “General Procedure to Change a Jumper Setting” on page 100.
2. Move the Password jumper from pins 5 and 6 to pins 6 and 7.