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M440LX Server System Product Guide
179
Table 8-1. System Board Jumpers
Jumper
Pins (default
in bold) Description
CPU Speed Enable Permits changing the processor speed in the BIOS setup
program.
Protect
Prevents changing the processor speed.
Boot Option Recovery
Boot
Prevents inverting address A16. Allows the system to boot
from the Recovery BIOS when the normal BIOS gets
corruptedif you are unable to reload a fresh copy from
the diskette.
Normal Boot
Inverts address A16 so the Normal BIOS does not reside
at the top of Flash memory where the write-protected
Recovery BIOS region is located.
Password Clear Clears the password.
Protect
Maintains the current system password.
CMOS Clear Replaces the contents of NVRAM with the manufacturing
default settings.
Protect
Preserves the contents of NVRAM.
Chassis Intrusion Detection
The chassis contains alarm switches that get activated if a cover is removed.
To bypass the chassis intrusion switches, do this:
1. Observe the precautions on page 3, “Safety Guidelines.”
2. Remove the left side cover as described in Chapter 4, “Working Inside
Your System.”
3. Move the jumper on J3J1, Chassis INTR Detect from the ENA pins to
the DIS pins.
4. Replace the left side cover, and connect the power cord(s) to the system.
5. Turn the system on, and wait for POST to complete; for instructions on
running POST, see Chapter 3, “Configuring The System.”
6. Run the SCU to configure your system. For information on running the
SCU, see Chapter 3, "Configuring The System."