Toshiba Tecra A8 Maintenance Manual - Page 74

2 Troubleshooting Procedures 2.4 System Board Troubleshooting Table 2-4-1 Debug port (Boot mode) error status (2/9) D port status Inspection items F009 Saving key scan code Setting of TASK_1ms_TSC FAN control Initialization of sound When request BIOS, EC/KBC rewriting When BIOS renewal is prohibited When BIOS ROM is abnormal Key input Reading CHGBIOSA.EXE / CHGFIRMA.EXE F100 Prohibition of cache Permission of L1/L2 cache in Flash ROM area Renewal of microcode Details Clears mute Sets the volume to max. (model controlling volume) Blinks green (cycle:2s, on:1s, off:1s) Blinks orange (cycle: 8s(On:4s,Off:4s), beeps for 30s and holts (DPORT=F00BH)) Blinks orange (cycle: 2s(On:1s,Off:1s)) Prohibition of USB Beep Waiting for key input FDC reset Setting parameters for 2HD(1.44MB) Reading of first sector, If it is the data of 1.44MB (2HD), the media type is definite. Setting of parameters for 2DD (720KB) Retrieval of "CHGBIOSA.EXE" from the root directory. Directory start header and calculates the sector Read 1 sector of the root directory Retrieval of entry of "CHGBIOSA.EXE" /"CHGFIRMA.EXE" from the sector read. Reading of EXE header of "CHGBIOSA.EXE" and "CHGFIRMA.EXE" Key input when error occurred Execution of "CHGBIOSA.EXE" and "CHGFIRMA.EXE" 2-26 [CONFIDENTIAL] TECRA A8 /Satellite Pro A120 Maintenance Manual (960-573)