Sony PCV-L400 Reference Manual - Page 25
Configuring the System Board, Clear CMOS Jumper, VGA Enable Jumper
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Configuring Your System 17 Configuring the System Board The system board contains the following configuration jumpers: u Clear CMOS u VGA Enable u INTEN 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. Clear CMOS Jumper The Clear 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. To change the Clear CMOS jumper, perform the following steps: 1 Remove the system cover (see "Removing the System Cover" on page 20). 2 Set the jumpers as directed by a service technician (also see "CMOS Clear (CMOS)" on page 59). 3 Reinstall the system cover (see "Replacing the System Cover" on page 21). VGA Enable Jumper You can enable or disable the onboard VGA controller if you install a VGA PCI add-in card.