Toshiba Tecra A2-S239 Maintenance Manual - Page 79

2.4 System Board Troubleshooting 2 Troubleshooting Procedures D port status (F105h) F106h Table 2-3 D port status (5/9) Inspection items Initializing ACPI, KBC, VGA, sound function, and PIC Details Measuring the clock speed of a CPU Permission of SMI except auto-off function Control the excess of the rated input power Battery discharge current control (1CmA) AC adapter rated over current control Dividing procedures for time measuring of IRT Setting for clock generator Checking the parameter block A Initialization of CPU Micro code update Confirming CPU type Check the support of Geyserville Set the CPU clock to "High" Set Graphics Aperture Size (except VGA_BUS=0) Storing the configuration of ROM in a buffer Reading EC version Updating the type of flash memory Determining what country the computer is designed to be used in by DMI data Checking the default settings of CMOS (When finding Bad Battery, Bad CheckSum (ROM, CMOS), set default) Initializing ACPI table (For executing option ROM) Initialization of the device needed initializing before PCI BUS Initialization AC'97 control Initializing information of thermal control Initializing a KBC Turning VGA display off and controlling reset Initializing sound function Acquiring the computer multiple box status HC initialization, Recognition of USB device connection and initialization Permission/ prohibition of Built-in LAN control Initializing a PCI Testing a PIC Initializing password Satellite A50/TECRA A2 Maintenance Manual (960-478) 2-25