Clearing Cmos Using The Clear Cmos Jumper; Clearing The Cmos By Removing The System Battery - Sun Microsystems Sun Fire X2100 User Manual

4.5.10.1

Clearing CMOS Using the Clear CMOS Jumper

This procedure describes how to clear the CMOS using the Clear CMOS jumper
(JP2):
Caution – Clearing the CMOS causes the server to revert to the factory default BIOS
settings, regardless of how the server boot options have been set up using the
System Setup Utility or the BIOS setup.
Note – The Clear CMOS Jumper function is disabled in BIOS version 1.1.5 (and
higher). To clear the CMOS see,
the System Battery" on page
1. Power off the system and remove the cover as described in
Off the Server and Removing the Cover" on page
2. Locate the Clear CMOS jumper (JP2). JP2 is located next to cable connector J33 on
the motherboard, see
page 4-47
Note – JP2 is a three position jumper. The default/normal position has the jumper
cap over pin 1 and pin 2.
3. Remove the jumper cap from pins 1 and 2, and place it on pins 2 and 3.
4. Wait 15-20 seconds and then remove the jumper cap from pins 2 and 3, and return
it to the default/normal position.
The CMOS is cleared.
5. Install the cover and power on the server.
4.5.10.2

Clearing the CMOS by Removing the System Battery

You can clear the CMOS by removing the system battery for 15-20 seconds. Use the
following procedures to remove and install the system battery and clear the CMOS:
1. Remove the system battery (see
page
To clear the CMOS wait 15-20 seconds before installing the battery.
2. Install the battery (see
page
Section FIGURE 4-37, "Motherboard Cable Connection" on
for the location of connector J33.
4-36).
Section 4.5.11.2, "Installing the System Battery" on
4-38).
Section 4.5.10.2, "Clearing the CMOS by Removing
4-35.
4-3.
Section 4.5.11.1, "Removing the System Battery" on
Chapter 4 Maintaining the Sun Fire X2100 Server
Section 4.3, "Powering
4-35