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2 Troubleshooting Procedures 2.4 System Board Troubleshooting
2-22 PORTEGE A100 Maintenance Manual (960-460)
Table 2-3 D port status (3/7)
D port status Inspection items Details
Configuring cache memory
Enabling L1/L2 cache memory
Testing CMOS for access (only in Cold Boot)
When a error is detected, HLT.
Checking the voltage of a CMOS backup battery
Examining the checksum of CMOS
Initializing data in CMOS (1)
Setting up IRT status
F102h Checking and initializing
CMOS
Storing the size of DRAM
F103h Checking of resume error Branch of resuming( only in Cold Boot)
When a CMOS error is detected, it does not branch.
When a resume status code is not set, it does not
branch.
Checking of resume error
S3 return error
Resume error F17AH
Check sum check of SM-RAM Resume error F173H
Checking change of memory configuration
Resume error F173H
Check sum check of RAM area of System
BIOS Resume error F179H
Check sum check of PnP RAM Resume error F177H
Goes to resuming process.
Resuming error process
Returning the CPU clock to Low
Disabling all SMI
Clearing resuming status
Returning to ROM
Assigning the area, C000h to EFFFh, to PCI (Disabling
DRAM)
Setting a request for a resuming error
Copying system BIOS from ROM to RAM
Initializing SMRAM
Checking the factor of WakeUp
Changing SMRAM base and storing CPU state map for
BIOS
F104h Checking the factor of
WakeUp
Enabling SMI only by ASMI