Toshiba A100 VA3 Maintenance Manual - Page 62

2.4 System Board Troubleshooting 2 Troubleshooting Procedures Table 2-3 D port status (2/7) D port status F005h F006h Inspection items (F003H) F100H F101H Checking the type and size of DRAM Testing of SM-RAM stack area Details Saving scan code Setting TASK_1ms_TSC Controlling fan Initializing sound items (for BEEP) Enabling system speaker Releasing mute Making the volume max. Key input Disabling USB once Beeping Waiting for key-input Reading CHGBIOSA.EXE/CHGFIRMA.EXE Resetting FDC Setting parameters for 2HD(1.44MB) and transporting rate Setting parameters for 2DD(720KB) and transporting rate Searching CHGBIOSA.EXE in the root directory Calculating the start head and sector in the directory Read one sector Searching the entry "CHGBIOSA.EXE" / "CHGFIRMA.EXE " Reading the EXE header of and "CHGBIOSA.EXE" / "CHGFIRMA.EXE" and execute them When an error detected, goes to Key input. Disabling cache Initializing H/W( before recognizing DRAM) Initializing chipset Initializing FLUTE Initializing PIT channel 1( Refresh interval→30µs) Checking the type and size of DRAM (in Cold Boot) When DRAM size = 0, HLT. Testing of SM-RAM stack area When it can not be used for a stack , HLT. PORTEGE A100 Maintenance Manual (960-460) 2-21