Toshiba A20-S259 Maintenance Manual - Page 74

2 Troubleshooting Procedures 2.12 Sound Troubleshooting Table 2-3 Printer port LED boot mode status (2/8) LED Status (B3h) Test item B5h Display initialization B6h Second controller initialization Message DRAM configuration Enable L1 cache Memory clear Transition to real mode, coping BIOS on RAM Storing key scan code Setting TASK_1ms_TSC Display initialization FAN control Sound controller initialization (for beep) Enabling system speaker Disabling mute Setting the volume to max Display of message (EC/KBC UPDATE/DAMAGED, BIOS UPDATE/DAMAGED) Key input Disabling USB Sound beep Waiting for key input Reading "CHGBIOSA.EXE"/"CHGFIRMA.EXE" FDC reset Setting parameters for 2DD (720KB), setting transmission rate Reading the first sector (For 2HD (1.44MB), the media is defined.) Setting parameters for 2SS (720KB), setting transmission rate Searching "CHGBIOSA.EXE" from route directory Working out the head and sector of directory start Reading the route directory by one sector Searching the entry of "CHGBIOSA.EXE"/"CHGFIRM.EXE" from the sector read. Key input when an error is detected while reading the EXE header of "CHGBIOSA.EXE"/ "CHGFIRM.EXE" Executing "CHGBIOSA.EXE"/ "CHGFIRM.EXE" 2-24 Satellite A20 Maintenance Manual (960-444)