Toshiba Tecra A2-S239 Maintenance Manual - Page 78

2 Troubleshooting Procedures 2.4 System Board Troubleshooting D port status (F103h) F104h F105h Table 2-3 D port status (4/9) Inspection items Details Processing resume error SMRAM initialization Initialization of the device Which needs initialization before PCI BUS Initialization Checking the change of memory configuration Resume error F173H Checking CheckSum of RAM area of system BIOS Resume error F179H Checking CheckSum of expanded memory (Montara) Resume error F176H Checking CheckSum of PnP RAM Processing resume (RESUME_MAIN) Return the CPU clock to Low Disabling all SMI Clearing resume status Return to ROM Send the area from C0000h to EFFFFh to PCI (Disabling DRAM) Setting up Resume error request Copy ROM/RAM of the System BIOS (HLT when an error occurred) Initializing SMRAM Checking the factor of WakeUp Rewriting the SMRAM base and Storing CPU state map for BIOS Enabling SMI only by ASMI PCI test (at Cold boot only) and Initialization Setting test pattern in PIT#0 of Channel 0 Checking whether test pattern set can be read Initializing the channel 0 of a PIT (set 55ms for the interval of interrupt timer) Initializing the channel 2 of a PIT (set 664Hz frequency for sound generator) Testing the channel 1 of a PIT (Checking whether refresh signal works properly with the cycle of refresh interval 30µs), HLT when timeout Testing the channel 2 of a PIT (Checking whether speaker gate works properly) 2-24 Satellite A50/TECRA A2 Maintenance Manual (960-478)