Sony PCV-L640 Reference Manual - Page 31

Configuring the System Board, CMOS Jumper - support

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Configuring Your System 17 Configuring the System Board The system board contains the following configuration settings: ❑ CMOS jumper ❑ CPU Multiplier switches ❑ AGP_INT switch ❑ VGA switch ✍ The configuration jumpers should never need changing unless otherwise directed by a technical support or service technician. ! Before opening the system, save any open files, exit Windows, turn off the power of the computer and all attached peripherals, and unplug the power cord. CMOS Jumper The CMOS jumper provides two modes of operation: Normal mode, and Clear CMOS mode. Normal mode allows normal access to the BIOS Setup Utility. The Central Processing Unit (CPU) input clock is forced to remain at 100 MHz (fast mode), and the Basic Input/Output System (BIOS) uses the User CMOS settings (as opposed to the System CMOS settings). The CMOS and NVRAM settings are only cleared if the checksum test returns false. Access to specific setup fields is controlled by a supervisor password or user password. The Clear CMOS mode removes the password that is stored in CMOS. No other parameters are cleared.

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Configuring Your System
17
Configuring the System Board
The system board contains the following configuration settings:
CMOS jumper
CPU Multiplier switches
AGP_INT switch
VGA switch
CMOS Jumper
The CMOS jumper provides two modes of operation: Normal mode, and
Clear CMOS mode.
Normal mode allows normal access to the BIOS Setup Utility. The Central
Processing Unit (CPU) input clock is forced to remain at 100 MHz (fast
mode), and the Basic Input/Output System (BIOS) uses the User CMOS
settings (as opposed to the System CMOS settings). The CMOS and
NVRAM settings are only cleared if the checksum test returns false.
Access to specific setup fields is controlled by a supervisor password or
user password.
The Clear CMOS mode removes the password that is stored in CMOS. No
other parameters are cleared.
The configuration jumpers should never need changing unless otherwise directed by a
technical support or service technician.
!
Before opening the system, save any open files, exit Windows, turn off the
power of the computer and all attached peripherals, and unplug the
power cord.